5 Mistakes That Will DesttroyYour Tomatoes…

Garden Bliss
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1 Video View·Apr 5, 2026
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Diseased leaves, blossom end rot, weak plants, tomatoes splitting, soil borne diseases.
Tomatoes can give you a lot of problems if you do a few things wrong. But do things right and
you will be harvesting the most beautiful and delicious fruit you can ever imagine.
Today I'm going to share with you five mistakes you cannot afford to make when growing tomatoes.
Let's go!
One of the most impactful mistakes I see gardeners make has to do with pruning and
staking their tomatoes. You got to get both right to get the full benefit.
First off, for the highest level of production you want to grow indeterminate tomatoes vertically,
either up a stake or a string. These tomatoes will continue producing fruit
up until a frost or disease kills them. They just keep flowering and keep fruiting.
On the other hand, determinate tomatoes grow best in a cage.
They will put out a few big fruit sets and then stop producing.
For indeterminate varieties, I suggest you prune them to grow up one stem by removing the suckers,
which is the growth that forms in the crotch of the sunleaf and the stem.
You want to remove them when they are young, ideally when you can just pluck them off with
As the plant grows, continue to remove the suckers and tie the tomato to a stake or string.
Using tomato clips is the easiest and safest way in my opinion.
By pruning to a single stem and growing vertically,
you're allowing the plants to get way more airflow and way more light,
which are the two major enemies to fungal diseases.
So just by pruning you can significantly reduce blight problems.
Here's a quick tip to avoid sun scald on your tomatoes.
If you live in a hot area that gets a lot of sun,
and you're growing especially beefsteak tomatoes,
it's a good idea to leave a sucker around like right at the center of your plant.
This way when the sun is beating down,
your tomato can get a little bit of shade from that
and that will prevent your tomato from getting sunburned,
or as we call it when growing tomatoes, sun scald.
What about determinate varieties though?
Should you prune them?
The answer is yes, but not the same way as you prune the indeterminate ones.
For determinate varieties,
we want to go out and remove leaves that are low and close to the ground
to allow air to easily move up through the plant.
But we don't want to remove the suckers,
because our determinate varieties won't continue to produce all season long
like our indeterminate ones will.
To allow us to get the most fruit before the plant finishes,
we want to leave the majority of the suckers on the plant
to maximize the future harvest.
An important note,
whenever you see diseased leaves on any tomato plants,
no matter what kind you're growing,
make sure to remove them so disease doesn't spread.
By staying on top of pruning,
we can prevent disease or at least slow it down
and reduce its impact if it does show up.
When pruning, we want to keep things clean and sterile
to make sure we aren't spreading disease from one plant to another.
What I like to do when pruning tomatoes is use gloves
if I'm pruning multiple plants,
and I also make sure that I'm cleaning my pruner with isopropyl alcohol
when I go from one plant to the next.
This next mistake seems simple,
but it could snowball into multiple issues
that end up being hard to trace back to the root cause.
Blossom and rot, such an annoying problem.
You grow healthy tomato plants, they look great,
the fruit is forming and looks okay,
then flip it over and boom it's rotting from the bottom.
All that work, that effort, it's frustrating.
We find out, oh, it's a lack of calcium.
We can add eggshells or bone meal or tums, that will fix it.
Well, those things will definitely add calcium,
but they probably won't fix the root of the problem,
which is improper watering.
Yes, blossom and rot is due to a lack of calcium,
but even if your soil has an adequate level of calcium in it,
if you're not watering consistently,
then your fruit won't be able to get the calcium
because calcium is what's known as an immobile nutrient.
It needs water to move it through the plant.
So if the fruit is trying to form on that plant
and you're not staying on top of watering,
then there's no way for that calcium
to be moved up to the fruit.
Here is where mulch plays an important role.
A good mulch will keep the soil from drying out too fast
and will keep it moist to allow the calcium
to be moved to your fruit
so it forms beautiful looking tomatoes.
Something as simple as improper watering
surely can't be the cause of more issues
with your tomatoes, right?
Well, it definitely is.
Having tomatoes that split or crack,
yep, another watering issue.
And yet a simple mulch will help with this as well.
Tomatoes split when the soil is overly dry,
then you come by and give them a heavy watering
or a big rainstorm comes
and they drink up a lot of water at once.
When this happens,
that causes the fruit to expand quicker
than the skin can keep up with.
This makes the tomato split.
It won't ruin your fruit,
you can still eat it,
but it will definitely ruin its shelf life.
To prevent this,
use a thick organic mulch like wood chips.
Also grow varieties that are crack resistant ones.
One of my all-time favorites
is the Mountain Magic tomato,
super productive and split resistant.
And you can harvest fruit early
and let them ripen inside to avoid splitting.
Using an apple will help them ripen even quicker.
Let's look at one more big issue
caused by improper watering,
fungal diseases.
Tomatoes will develop fungal issues
when their leaves remain wet
for too long a period of time.
Airflow and light are the enemy of disease.
Wet leaves and stagnant air are the breeding ground.
If you water your plants from the base,
you will keep the leaves dry
and avoid a lot of future headaches.
You're probably thinking,
yeah, well,
the leaves are going to get wet when it rains.
That is true,
but there's a reason that large-scale growers
use high tunnels.
Dry leaves mean less disease and more fruit.
Just by getting watering right,
you'll avoid blossom end rot,
blight issues,
and your tomatoes splitting and cracking.
One simple fix for such a massive payoff.
Unfortunately,
you could avoid the two previous mistakes
and still not get the harvest you were hoping for.
Plants might start strong,
but then slow down,
or grow a whole lot of leaves,
look super green,
but then not much fruit
if you don't get fertilizing right.
Before planting your tomatoes,
I suggest you mix into your soil
a good,
organic,
all-purpose fertilizer.
This way,
they can explode into growth
once they hit the soil.
Make sure you don't use a fertilizer
that is super high in nitrogen
or your plant will focus on leaf growth
instead of on fruit production.
Your plants will grow fast and look beautiful
if you feed them right.
Fertilizing once though,
won't be enough.
When your plants start flowering
and heading into production,
you want to go out
and give them a top dressing of fertilizer.
Mix it into the top few inches of the soil,
water it in,
then add your mulch.
This will make sure your plants have enough food
to keep you fed with tomatoes.
Later in the season,
it's good to go out again and feed your plants,
especially for indeterminate varieties
that never stop producing.
I have had some tomatoes grow
way past 10 feet tall
that continued to produce fruit for me
until mid-October
because I kept them pruned
and stayed on top of fertilizing.
The earlier the better,
right?
Get your plants in as early as possible,
this way they have the most amount of time
and you'll get the biggest harvest.
Well,
that's not always the case.
Transplanting out too early
is one of the most common
and demoralizing mistakes
I see new gardeners make.
Transplanting tomatoes into the garden
is such an exciting time,
especially if you started your plants from seed
and have nurtured them to this point.
But,
if you plant out too early,
then a late frost comes,
you'll find yourself scrambling around
to try to cover them
so they don't die.
Here is where a simple cover,
like a cut one gallon jug,
will be helpful.
The easiest thing to do to avoid this is
wait for the ground to heat up
and the frost to be far past.
Tomatoes are warm season crops,
they crave and they thrive in that warm weather.
Don't try to fight nature,
it rarely ever works out.
Also,
before actually transplanting into the garden,
you must harden your plants off.
They can go from
living inside in a controlled environment,
in a pot,
to then living outside in the ground
without some kind of transition period.
What you want to do is
have this transition period be over like a,
say, five or seven day window.
You can bring them outside the first day
when it's not too windy,
put them in like a shady location for an hour or two,
then bring them inside.
As the days go on,
bring them to areas where it's a little less shady
and give them a little more time outside
until they get to the point where they can spend 24 hours
outside on their own and show no stress.
At this point,
they're fully adjusted
and you can transplant them into the garden.
Let's shift to the next mistake,
fighting a losing battle against soil-borne diseases.
Have you ever grown a tomato plant?
You do everything right,
and yet still it gets a disease?
It can be super frustrating.
Believe me,
I've been there.
The unfortunate reality is
the problem might be your soil,
harboring diseases like
fusarium wilt and verticillium wilt.
Using sprays for these,
in my opinion,
is basically pointless
because we don't want to be poisoning our food.
Instead,
you can grow in containers
and use bagged soil
or make your own soil
and grow in raised beds
and avoid the diseased soil.
Another great option
is to just grow varieties
that are resistant to the problems that you're dealing with.
This goes for any issue with tomatoes,
not just soil-borne diseases.
There are so many different varieties out there
and some of them are fantastic
at being resistant to specific issues,
so do a little homework,
find out varieties that will,
you know,
be resistant to the problem,
then you won't have to deal with it.
You can grow a variety like the Super Sweet 100,
which has strong disease resistance
to fusarium wilt and verticillium wilt.
So instead of fighting the problem
and potentially poisoning your food,
you could avoid the problem
and use the natural characteristics of a variety
to safeguard your plant from disease.
I want to leave you with a bonus mistake
you cannot afford to make
and that's allowing the tomato hornworm
to decimate your plants.
They can do a lot of damage fast.
When your fruit starts to form,
you want to make sure that you're out there
on the prowl
checking to make sure that there's no damage
from the tomato hornworm.
The best way to find them is at night
using a black light
because they'll actually glow in the dark
when you use that.
At this point,
you can either pick them off
or you can use a spray like this one,
BT.
This is the one that I use.
It's effective.
It's organic
and you can use it up to the day of harvest.
It's the same one that I use for my brassicas.
That's today's video growers.
Thanks for watching.
I hope you enjoyed it.
I hope you got something out of it.
It's still early
for me to have tomatoes in the ground here
but the time to be thinking about these mistakes
is now before they happen.
It's always better to avoid a problem
rather than having to manage it.
When you have to manage so many problems all the time,
it just gets to be a lot of work
and a lot of headache.
If you can just do a little prevention,
it definitely goes a long way.
Something as simple as mulch,
like I mentioned in the video,
will prevent so many problems
and will make it so you're not all the time
out there watering
and it's just a simple thing
that makes definitely a big difference.
So get your mulch down,
prevent a lot of these problems,
don't water the leaves of your plants.
It's just little things
but they make big differences.
It's like throwing in a pebble.
That little ripple turns into a big wave.
I had a blast out here.
I hope you guys enjoyed the video.
I want to send a thank you
to one of our new channel members, Jessica Byers.
Thanks for being a part of Team Grow.
Thanks for having your hand
in everything we're doing out here.
I also want to mention
that we've got some really great stuff
over at the shop that you can pick up.
There's all different kinds of seeds,
great varieties.
We've got some merch down there.
We've also got our Team Grow plant armor
which is that kaolin clay
that you spray on the plants
and it protects them from a host of different issues
like some important ones.
We're talking cucumber beetles
and plum curculio
if you live around here
and you're trying to grow fruit.
So it's a fantastic organic spray.
It's just clay but it's super fine
and it's very valuable in the garden.
Again, I had a good video.
It was fun to make this one
and I can't go a video
without showing the young king.
I wish he was out here with me
but he's not
and he's not really featured in this video much
because he wasn't really a fan of tomatoes.
He liked a lot of the root crops
like the carrots,
the radishes,
stuff like that
and he also loved the asparagus
which is just starting to pop up here.
That's a sign that things are getting close
but going back to a previous video
one thing that tells me tells me
when to plant
is that idea of phenomenological timing.
So when something happens in the garden
like asparagus pops up
that tells me that it's time for something else.
We haven't yet gotten to the point
where it's time for me to get the tomatoes in.
I honestly still have probably like
you know about six weeks over a month.
Can't wait for it.
Prepping for it
and we've got a lot of tomatoes started and growing.
So stick along for the continued videos
and hit that subscribe button.
Hit that like button.
We'll catch you on another one real soon.
We out.
