The 5 Most Common Tomato Planting Mistakes – And How To Avoid Them!

If you want to have a big tomato harvest this year – it all starts by avoiding some of the most common tomato planting mistakes when first putting them in the ground.

Getting your tomato plants off to a good start is a big key to a healthy tomato crop.

Here is a look at 5 of the biggest mistakes made when planting, and how to avoid them for a great harvest!

The 5 Biggest Tomato Planting Mistakes

#1 Planting In The Same Location

One of the biggest mistakes made in vegetable gardens is to not rotate crops from year to year.

crop rotation
Planting in a new space each year is one of the best ways to keep your tomato crop healthy and disease free.

And with tomatoes, a lack of crop rotation can really hurt this year’s crop – and future tomato crops too.

Tomato plants use a tremendous amount of resources from the soil. And to boot, they are susceptible to numerous soil and soil-borne diseases.

Both blossom-end rot and tomato blight, two of the largest killers of tomatoes, are the result of soil issues.

Blossom rot is due to a deficiency of calcium in the soil. While blight spores can take hold in the soil and stick around to destroy crops for multiple years.

tomato blight
Rotating where you plant tomatoes each year can help keep tomato blight at bay.

By rotating where you plant tomatoes each year, tomatoes can find the nutrients they need, and keep disease at bay.

For best results, never plant tomatoes in the same space in a garden for at least three years.

#2 Planting Too Early

Tomatoes are a warm weather and warm soil crop. Avoid the temptation of planting too early simply because you have had a few warm days.

Planting too early causes a whole host of problems for tender, young tomato plants. From potential frost and freeze damage, to rot and mold.

Allow warmer weather to settle in so that soil temperatures can heat up as well.

planting mistakes - planting too early
Don’t rush planting those transplants until the soil has warmed.

It takes a solid week to 10 days of 70 to 80 degree daytime temperatures to warm the soil.

A good rule of thumb is to wait until night time temps stay in the 50 to 55 degree range before planting.

#3 Not Planting Deep Enough

Tomatoes need to be planted deep to develop strong, healthy, and resilient roots.

Forget those shallow 2 to 4″ holes that barely cover the top soil edge of your tomato transplants!

planting tomatoes
Plant transplants deep enough to cover the first two sets of leaves. You do not have to cut off the leaves. They will help to grow new roots.

Dig down 8 to 10 inches to create your planting holes, and bury transplants below their first set of leaves.

And while you are at it, fill that planting hole back in with a good mix of compost and worm castings to power their growth. See : The Perfect All-Purpose Natural Fertilizer

#4 Not Staking Before Planting

This is one of the most oft-committed of the tomato planting mistakes.

Before you ever plant that first plant, get those tomato supports in place!

Putting stakes and cages in days or weeks after planting is a recipe for disaster.

Not putting supports in before planting is one of the most common tomato planting mistakes made. Put supports in before planting or at planting time to avoid damaging plants later.

Not only does the process damage plants and plant roots as you drive in the supports, the foot traffic also compresses the soil area around the roots as you work.

That compression can keep roots from absorbing both water and nutrients from the soil. And, even more, stunt growth.

Waiting too long can also lead to wind damage from plants falling over and breaking off.

#5 Not Mulching Plants

Last but not least, don’t forget to mulch those tomato plants! Leaving soil bare will cause all types of issues.

For one, it dries the soil and roots of the plants out at a rapid rate. And tomato roots need their moisture.

tomato planting mistakes - not mulching plants
Leaving soil bare after planting leaves the door open for all kinds of issues.

Mulch also regulates the soil temperature, keeping it from soaring or plummeting on cold or hot days.

And worst of all, competing weeds easily move in on bare soil to steal nutrients from the soil.

Mulch tomato plants with a 2 to 4″ thick coating of straw, shredded leaves or compost to help insulate and protect plants as they grow.

Here is to avoiding those tomato planting mistakes – and growing your best crop ever!

This Is My Garden

This Is My Garden is a garden website created by gardeners, publishing two articles every week, 52 weeks a year. This article may contain affiliate links.

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2 thoughts on “The 5 Most Common Tomato Planting Mistakes – And How To Avoid Them!

  1. How do you recommend rotation when you only have a few pots to use for your tomatoes? Is there something you can add to the soil to keep your plants healthy?
    Thank you

  2. Just read the most common tomato planting mistakes. Enjoyed the article. Some new information, and jolted my memory of things forgot. Thank you.

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