15 Perennials You'll Hate Not Planting in October

Every spring, garden centers fill up with people buying the same flowers they bought last year. They carry home the flats, plant them, water them all summer, and then watch them turn to mush at the first frost. Next April, they do it all over again. And every one of those people had a chance, the October before, to break that cycle for good. Because October is the month that separates gardeners who start from scratch every year from gardeners whose gardens simply come back. Right now the air is cooling, but the soil is still holding on to summer's warmth. That combination is perfect for perennials. Above ground, the plant isn't trying to push out new leaves and flowers in the heat. Below ground, the roots keep growing in that warm soil, sometimes for weeks after the air has turned cold. So a perennial you plant this month gets a head start that a spring-planted perennial can never match. By next spring, it wakes up already settled, already rooted, and ready to bloom. But October doesn't last. Once your ground freezes hard, the window is closed. And in colder regions, that can happen weeks earlier than people expect. So here's the rule for everything in this video. Don't plant by the calendar. Plant while your soil is still workable, and aim to get perennials in the ground at least four to six weeks before it freezes. If you're in Zone 3 or 4, that might mean this week. If you're in Zone 7 or 8, you may have until November. And stay with me, because a few of these plants come with a twist. One of them you'll plant when it looks completely dead, and that's exactly the right time to do it. Another can bloom through snow in February. One can live longer than the house it's planted beside, but only if you get one small detail right on planting day. And the number one plant on this list is the one you'll truly hate missing, because if you don't plant it this fall, you can't fix that mistake next spring. You'll have to wait an entire year. But before we start, I have something I'm really excited to share. For a long time, I've wanted to put everything I know about building a garden that comes back on its own into one place. A complete reference you can keep on the kitchen counter and turn to season after season. It's finally here. It's called the Forever Garden, and it's 173 pages of the plant-once method. Inside, you'll find 70 perennials that return every year, each on its own page with its zones, light, size, bloom time, and a plant-once rating, so you know exactly how long it will last and how little it asks of you. There are zone-by-zone planting calendars for zones 3 through 9, 12 ready-made garden layouts that show you exactly what goes where, and a whole chapter on designing a garden with color from late winter to frost. I've also included the Aggressive Plant Blacklist, a troubleshooting guide and printable worksheets you can use every year. Scan the QR code on your screen or tap the link in the pinned comment or description to get your copy. Now, let's start the countdown. Number 15. Catmint. If you want one plant that makes a new garden look established in a single season, start here. Catmint forms a soft, billowing mound of gray-green leaves, and from late spring it disappears under a haze of lavender-blue flowers. Bees love it so much that on a warm afternoon, the whole plant seems to hum. And unlike many flowers that bloom for two weeks and stop, catmint keeps going for months if you treat it right. The secret is one simple haircut. When the first big flush of flowers starts to fade in early summer. Take a pair of shears and cut the whole plant back by about half. It looks brutal, but within two weeks fresh leaves fill in and a second wave of flowers follows that can carry on until frost. That's one five-minute job for an entire summer of color. October planting suits catmint well. Set it in full sun and well-drained soil with the top of the root ball level with the ground. Don't bury the crown. Water it in deeply and keep the soil lightly moist until the ground cools. What it doesn't want is rich, heavily fed soil because that makes it flop open in the middle. Leaner soil gives you a tighter, tidier plant. Deer and rabbits usually leave it alone because of its strong scent, which makes it one of the best edging plants for gardens where wildlife is a problem for most gardens look for Walkers low which grows two to three feet tall and wide if your space is small cats pajamas stays about a foot tall plant catmint along a path in front of roses or around the base of taller perennials and it softens every edge it touches but number 14 might be the longest blooming perennial you can buy number 14 hardy geranium 'Rozanne' first a quick clarification. This is not the geranium you see in window boxes. Those are tender plants called pelargoniums that die at the first frost. Hardy geraniums are true perennials, and 'Rozanne' is the star of the family. It was named Perennial Plant of the Year in 2008, and the reason is simple. It blooms from early summer right through to frost. Violet blue saucer-shaped flowers with white centers, month after month, with almost no help from you. Roseanne grows into a wide-spreading mound that weaves between neighboring plants. It's wonderful at the front of a border, spilling over a wall or filling the gaps beneath roses and taller perennials. Because it covers the ground so thoroughly, it also smothers weeds. And because it's sterile, it doesn't seed itself all over the garden, planted in October in full sun or light shade. In hot climates, a little afternoon shade keeps it looking fresh. Set the crown at soil level, water it well, and give it room. A single plant can spread 2 to 3 feet wide, so don't crowd it. If it starts to look tired or sprawling in midsummer, cut it back by half, and it will regrow quickly. Plant one this fall, and next June you'll understand why gardeners keep talking about it. And number 13 is the plant for the spot where everything else drowns. Number 13. Siberian Iris. Most gardens have a problem area, a low corner that stays soggy after rain, or heavy clay that never seems to drain. Many perennials rot there. Siberian Iris shrugs it off. It handles wet feet, clay soil and cold winters down to zone 3, yet it also grows happily in ordinary garden soil. In late spring, slender stems rise above clumps of grassy leaves and open into elegant flowers of deep purple, sky blue, white, or soft yellow. After the flowers fade, the foliage stays upright and attractive all season, which is something many perennials can't claim. And unlike bearded iris, Siberian iris is rarely troubled by iris borers or rot. Early fall is the traditional time to plant and divide it. If you're planting a potted plant, set it at the same depth it grew in the pot. If you're planting bare root divisions, set the rhizomes about 1 to 2 inches deep. That's different from bearded iris, which sits right on the surface, so don't confuse the two. Water well and keep the soil moist while roots establish. Then leave it alone. A Siberian iris clump can grow for 8 to 10 years before it needs dividing. and when it finally does, one clump gives you several new plants for free. Caesar's Brother is a classic deep purple and Butter and Sugar has white and yellow flowers. Quick pause before number 12. If this video is already changing how you think about fall planting, hit subscribe. This channel is about building a garden that comes back stronger every year, not one you rebuild every spring. And tell me in the comments, which of these first three do you already grow? catmint, rosanne, siberian iris, or none of them yet. And tell me your USDA zone. I read the comments, and your answers shape what I cover next. Now, back to the countdown. Number 12, daylilies. If there were a prize for the toughest perennial in America, daylilies would be in the running. They grow in sun or part shade, in clay or sand, in zone 3 winters and zone 9 summers. They handle drought once established, they shrug off neglect, and a single clump can keep blooming for decades. There's a reason you see them along roadsides and old farmhouses. They outlast nearly everything. Each flower opens for just one day, which is where the name comes from. But a healthy clump produces dozens of buds over several weeks, so the show goes on. And some varieties re-bloom all summer. Happy Returns gives you lemon yellow flowers from early summer to fall. And Stella d'Oro is the golden variety you've probably seen in parking lots, because it simply refuses to quit. October planting works well for daylilies in most zones. Dig a wide hole and set the crown, the point where the leaves meet the roots, about an inch below the soil surface. Spread the roots out, backfill, water deeply, and you're done. Space them about 18 inches to 2 feet apart, since they'll fill out over time. There's one real weakness. Deer treat daylily buds like candy. If deer visit your yard, plant daylilies close to the house or protect them with repellent. Otherwise, there's almost nothing to do except snap off old flower stalks once blooming ends. Every five years or so, when the center of a clump gets crowded, dig it up and split it into several new plants. Free daylilies for life. Number 11. Purple Coneflower This is a native prairie plant, and it carries the toughness of the prairie with it. Purple coneflower handles heat, drought, humidity, and poor soil once it's settled. And it blooms from early summer into late summer, with pink-purple petals around a bristly orange cone. Butterflies love the flowers. And in fall and winter, goldfinches perch on the seed heads and pick them clean. That's why my advice for coneflower is the opposite of what many people do. Don't cut it back in fall. Leave the seed heads standing for the birds and for winter structure, and tidy up in spring. Coneflower will also scatter a few seedlings, which means your patch slowly grows on its own. Now, a word on October planting. Coneflower does well when planted in early fall in zones 5 through 9. In the coldest zones, plant it early in the month or wait for spring, because a young coneflower without established roots can be pushed out of the ground by freezing and thawing. Plant it in full sun, keep the crown at soil level, water it in, and add a light layer of mulch once the ground cools. One more tip. Many of the fancy double and bright orange coneflower hybrids are short-lived. If you want a coneflower that comes back year after year, choose the straight species or a proven variety like Magnus. Those are the ones that earn the plant once label. Number 10, hosta. Now we move into the shade, and no plant rules the shade garden like the hosta. There are thousands of varieties, with leaves in blue, green, gold, cream-edged and streaked forms, from miniatures the size of a teacup to giants six feet across. Plant one in the right spot, and it can live for decades with almost no care at all. Fall is a good time to plant hostas because the soil is warm and the heat is gone so the roots can settle without stress. Set the crown right at soil level, water thoroughly, and mark the spot. That part matters because hostas disappear completely in winter, and it's easy to dig into one by accident in early spring. The color of the leaves tells you how much light the plant wants. Blue and dark green hostas handle the deepest shade. Gold and white-edged varieties usually look best with a little gentle morning sun. Too much afternoon sun, especially in the south, will scorch the leaves. Hostas have two real enemies, slugs and deer. Thick-leaved blue varieties like Halcyon resist slugs much better than thin-leaved ones. If deer visit your yard, plant hostas near the house or use repellent. Get those two things right, and you'll have a plant that comes back bigger and fuller every year. Summon Substance is a huge gold variety that makes a dramatic centerpiece, and Patriot has crisp white edges that light up a dark corner. And number nine is the perfect plant to put right beside a hosta. Number nine, Japanese Painted Fern. Most ferns are simply green. This one looks as if someone brushed it with silver paint and a touch of burgundy. The fronds are silvery gray with wine-red stems, and they bring light and color into dark corners where flowers struggle. It was named Perennial Plant of the Year in 2004, and it's one of the easiest ferns you'll ever grow. Plant it in October in part to full shade, in soil that stays reasonably moist. Set the crown at soil level, water well and add a light layer of shredded leaves or compost around it. Keep it out of hot afternoon sun, which washes out the silver color. Once established, it spreads slowly into a lovely clump, but it never becomes invasive. Care is almost nothing. In early spring, cut away last year's tired fronds before the new ones unfurl. That's it. Pair it with hostas, astilbe, or coral bells, and the contrast in leaf shapes and colors makes even a small shady bed look designed. If you want something taller and even more silver, look for ghost. 8. Barrenwort, also called Epimedium This is the answer to the hardest spot in almost every yard, dry shade under trees. Tree roots soak up the water and the canopy blocks the light, and most plants simply give up there. Barrenwort doesn't. Once established, it's one of the toughest ground covers you can plant. In spring, delicate spurred flowers in yellow, pink, red or white float above heart-shaped leaves. The new leaves often emerge tinted bronze or red, and in many varieties the foliage colors up again in fall. Over time, it knits together into a dense carpet that keeps weeds out. October is a good time to plant it. Tuck it into pockets between tree roots rather than piling new soil over them. Set the crown at soil level and water it well. The first year is the only year it really needs you. Water it through any dry spells until it's established, and after that it handles dryness on its own. The only routine job comes in late winter. Cut the old leaves down to the ground before the flowers appear, so you can see the blooms clearly. Sulphureum, with soft yellow flowers, is one of the toughest. Barrenwort is slow to start, but it lives for decades. And number seven is where this list starts reaching into next spring. Number 7. Ornamental Alliums These are members of the onion family, but you grow them for their flowers. In late spring, they send up tall, straight stems topped with perfect purple spheres that look like something from a storybook. Bees cover them, and after flowering, the dried seed heads stay standing for weeks as natural sculptures. Alliums grow from bulbs, and bulbs have to go in during fall. They need a period of winter cold underground to bloom. Plant them in October, about three times as deep as the bulb is tall. For the popular large varieties, that means six to eight inches deep. Set them pointed end up, in full sun and soil that drains well, because bulbs rot in soggy ground. Here's the design trick. Allium's leaves start to yellow just as the flowers open. So plant them behind bushy perennials, like catmint, hardy geranium, or salvia, which hide the fading foliage while the purple globes float above. Leave the leaves until they wither, since they're feeding next year's bulb. And there's a bonus, because alliums are in the onion family. Deer, rabbits, voles, and squirrels usually leave them alone. Purple Sensation is affordable and reliable. and Globemaster produces enormous heads. Plant a dozen this October and you'll have one of the most striking sights in your garden next May. Number 6. Oriental Poppy This is the plant I mentioned at the beginning, the one you plant when it looks completely dead. Oriental poppies bloom in late spring with enormous papery flowers in scarlet, orange, salmon, pink or white, each with a dark, dramatic center. The show is short, but it's unforgettable. Then, in midsummer, something strange happens. The leaves turn yellow, and the plant vanishes. It isn't dying. Oriental poppies go dormant in summer heat, and many gardeners pull them out by mistake. Then in fall, cool weather wakes them up and a fresh rosette of leaves appears. That summer-to-fall dormancy is exactly why late summer and early fall are the classic times to plant them. Set potted plants at the same depth they grew in the pot, in full sun and well-drained soil, and water them in. Once planted, leave them alone. Oriental poppies grow a deep taproot and don't like being moved. They're happiest in zones 3 to 7 and struggle in hot, humid summers. The key design tip is to plant something nearby that fills the gap when the poppy disappears in midsummer. Baby's breath, asters, or a late-season perennial will cover the spot. Beauty of Livermere is a classic deep red, and Royal Wedding is pure white with a black center. Number 5. Snowdrops. This is the plant I promised could bloom through snow. Snowdrops are often the very first flower of the year. In February and March, little nodding white bells with green markings push up through cold soil, and sometimes right through a thin layer of snow. After months of brown and gray, nothing lifts your spirits faster. Snowdrops are bulbs, so like alliums they must be planted in fall. Set them about 3 inches deep and 3 inches apart in part shade, ideally under deciduous trees or shrubs, where they get winter sun before the leaves come out. Plant them in groups of 25 or more for the best effect. A single snowdrop is easy to miss. A drift of them stops people in their tracks. One honest tip. Dry snowdrop bulbs sold in stores can be unreliable because they don't like drying out. Buy them as early in fall as possible and plant them right away. If a friend has a patch, the most reliable method is to dig a clump just after flowering while the leaves are still green and replant it immediately. Once they're established, snowdrops need nothing from you. They're poisonous to deer and rodents, and they slowly multiply into carpets that come back every winter for generations. They grow best in zones 3 through 7. 4. False Indigo, also called Baptisia When you plant a young Baptisia, it looks like almost nothing A few thin stems, a handful of blue-green leaves You might wonder why it's on this list Give it three years, and it becomes a shrub-sized perennial Three to four feet tall and wide Covered in late spring with spikes of indigo-blue pea flowers After that come inflated seed pods that turn black and rattle in the winter wind. Baptisia is a North American native and one of the longest-lived perennials you can grow. It handles heat, drought, and poor soil. Deer rarely touch it, and it hardly ever needs dividing. It even makes its own nitrogen through its roots, so you never need to feed it. The reason for all that toughness is underground. Baptisia grows a deep taproot that can reach several feet down. That's also why location is everything. Once it's established, it really doesn't like being moved. So choose the spot carefully, in full sun with room to grow, and plant it as if you mean to leave it there for 20 years, because you will. In October, set it at the same depth it grew in its pot, water it in, and keep the soil moist until the ground cools. Then be patient. Gardeners say perennials sleep the first year, creep the second year, and leap the third. Baptisia is the perfect example. The straight blue species is wonderful, and purple smoke and the compact decadence series give you more color choices. And Baptisia is exactly the kind of plant I built my guide around. If you're tired of replanting every spring and want a garden that grows stronger every year, the Forever Garden is now available. Every one of the 70 perennials inside has its own page with its zones. Light, Size, Bloom Time, and Plant Once rating, so you can see at a glance which plants will still be there in 20 years. The zone calendars tell you exactly when to plant and divide where you live, and the 12 ready-made layouts show you what goes where and how many plants to buy. Scan the QR code on your screen, or find the link in the pinned comment and description. Now, the top three. And number three is the plant that blooms when the rest of the garden is still asleep. Number 3. Lenten Rose, also known as Hellebore. In late winter, when your beds are bare and brown, hellebores open nodding. Cup-shaped flowers in white, cream, blush pink, plum, deep burgundy, and almost black. Some are speckled, and some are double. And the flowers last for weeks, often from February well into April. The leaves are leathery and evergreen in most zones, so the plant looks good nearly all year and every part of it is poisonous which means deer and rabbits leave it alone. That makes it one of the best shade plants for gardens where wildlife eats everything else. Hellebores grow best in part shade especially under deciduous trees where they get winter sun and summer shade. Give them rich soil that drains well. Here's the October planting mistake to avoid. Don't plant them too deep. Keep the crown right at the soil surface. A buried crown can rot and fail to flower. Water them in well and keep them watered through their first year. After that, hellebores are remarkably low maintenance. The one job is in late winter. Cut away last year's tattered leaves just before the new flowers rise so the blooms show clearly. Wear gloves when you handle them, since the sap can irritate skin. Over time, happy plants scatter seedlings around themselves, and those little volunteers become a bigger patch. The honeymoon and wedding party series are both easy to find. Number 2. Peony This is the plant I promised could outlive the house it's planted beside. Peonies are famous for blooming in the same spot for 50, even 100 years. There are old farmhouses where peonies still flower every June, long after the people who planted them have gone. If you want to understand what plant once really means, this is your plant, and fall is the classic time to plant them, especially bare-root peonies. But there's one detail that decides whether your peony ever flowers, and that's planting depth. Look at a bare-root peony, and you'll see small pink or red buds near the top of the roots. Gardeners call them eyes. In colder zones, those eyes should sit no more than about 2 inches below the finished soil surface. In warmer zones, keep them even shallower, about 1 inch or less. This is the mistake I warned you about. Plant a peony too deep, and it grows healthy leaves year after year, but never blooms. People often think they've bought a bad plant, when really it just needs to come up a little. So measure carefully when you plant. Choose a spot in full sun with well-drained soil and choose it for good because peonies dislike being moved. Water it in, mulch lightly once the ground cools, and pull the mulch back in spring. Be patient for the first couple of years. A new peony can take two or three seasons to bloom fully. In early spring, set a peony ring over the shoots so the heavy flowers don't flop in rain. And don't worry about the ants you'll see on the buds. They're harmless. Sarah Bernhardt is a beloved pink, Festiva Maxima is white with flecks of crimson, and in zones 8 and 9 choose early blooming varieties. And number one is daffodils. Here's why this is the one you'll hate missing. Every other plant on this list can be planted in spring if you miss October. Daffodils can't. Not if you want flowers. Daffodil bulbs need about 12 to 16 weeks of cold underground to bloom. That cold is the signal that tells the bulb it's time to flower. Skip fall planting, and that chance is gone until next year. When March arrives and your neighbor's yards light up yellow, you'll be looking at bare soil. And daffodils are the most reliable spring bulb there is. They're poisonous, so deer, rabbits, voles, and squirrels leave them alone. That's a huge advantage over tulips, which many animals treat as a snack. Daffodils also multiply underground, so a a handful of bulbs becomes a clump, and a clump becomes a drift that can bloom for generations. Plant them in October once the soil has cooled and before the ground freezes. Dig about six inches deep, or roughly three times the height of the bulb, and set each one-pointed end up. Plant them in groups of ten or more, not single rows. Clusters look natural and make a much bigger impact. They grow in sun or part shade, and they're especially good under deciduous trees, because they bloom before the leaves come out. After they flower in spring, here's the rule. Leave the leaves alone until they turn yellow, usually about six weeks. That foliage is feeding next year's bulb. Plant daffodils between daylilies or hostas, which grow up and hide the fading leaves. In zones three through 8. Almost any daffodil will do. In the warmest zones, choose jonquil and tazetta types, which need less winter cold. Tête-à-tête is a cheerful miniature, and Thalia is a fragrant, pure white. So let's put it all together. If you're in a cold zone, get your bulbs and your toughest perennials in first, like daffodils, snowdrops, alliums, peonies, Siberian iris and daylilies, and do it soon. If you're in a milder zone, you have a little more time, but don't wait for the last week. And wherever you live, remember the rule. Don't plant by the calendar. Plant while your soil is still workable, and at least four to six weeks before it freezes. The gardeners with the most beautiful yards aren't the ones working hardest every spring. They're the ones who planted the right things one October and let the years do the rest. If you want to build that kind of garden, the Forever Garden is linked in the pinned comment and description, or you can scan the code on your screen now. Tell me in the comments which of these 15 you're planting this October. Subscribe for more PlantOnce Gardening, and I'll see you in the next video.