Which Season is Best for Planting Tomatoes?

Which Season is best for Planting Tomatoes? It can be difficult to determine the best time to plant tomatoes. If you plant them too late in the season, you may not have enough time to harvest a full crop. However, if you start them too early, you risk stunting or even killing the plants.

There are a few important factors to consider when determining the best time to start growing tomatoes. Continue reading to find out how to calculate the best time to plant tomatoes in your climate. This article will teach you how to start seeds indoors and when and how to transplant seedlings into the garden.

Which Season is Best for Planting Tomatoes?

When Should You Start Seeds Indoors

Tomato Cultivation is an Investment

You don’t want to risk ruining your crop by planting too early or too late, whether you’re spending money on nursery stock or putting in the time and effort to grow them from seed. It is critical to get the timing right if you want a bumper crop of juicy, sweet fruits. To determine the best time to start tomato seeds and plants, start with when you intend to plant them outside in the garden and work backwards.

Determine Your Best Planting Date

First and foremost, you must wait until after the last expected frost date in your USDA Hardiness Zone. I know from personal experience that this can be difficult. However, even if you have an unseasonably warm spring, resist the urge to plant too soon!

Tomatoes are true summer crops. You risk killing them if you plant them too soon. Even if early transplants survive a few unexpected frosty nights, their growth may be stunted, and stressed plants are more vulnerable to pests and disease.

If you only pay attention to one thing, make it the expected last frost date for your growing zone and plant after that date. If you are unsure of your growing zone, you can use the USDA’s hardiness zone and climate calculator based on your zip code. When looking at first and last frost dates, remember that these are just ranges based on the average for your growing zone.

Because we all live in different microclimates, it is always a good idea to keep a yearly garden journal with your own frost dates. While this is an important starting point, there are several other important factors to consider if you truly want to pinpoint the perfect starting time. Best for Planting Tomatoes


Nighttime temperatures should be consistently above 50°F for tomatoes to thrive. Furthermore, it is best to wait until soil temperatures reach around 60°F before planting. If you don’t have a soil thermometer, stick your finger a couple of inches into the soil. If you can’t keep it there comfortably for a minute, the soil is probably still too cold. To help the soil warm up faster in the spring, spread a layer of thick mulch or black plastic out in the garden.


In addition to warm temperatures, these plants require plenty of sunlight to thrive. Before planting, ensure that the sun is high enough in the sky for enough of the day for the site to receive at least six hours of direct sunlight. The only exception is for gardeners in extremely hot climates, where some shade – especially in the afternoon – can be beneficial in protecting plants on scorching days.

Maturity Days

This is where things can become a little more complicated. While it is safe to plant immediately after the last frost, waiting a few weeks until the temperatures have warmed and the days have lengthened may result in healthier, happier plants. Some varieties, however, take a long time to mature, and it is also critical to ensure that there are enough warm days for plants to produce fruit before they are harmed by fall frosts.

The number of “days to maturity” listed on the back of your seed packets will assist you in determining the best planting window for your growing zone. First, determine when the first frost of the season is expected in your area. Using the number of days to maturity listed on the seed packet or plant tag, count backwards from this date.

Between the last frost of spring and this date, you can safely plant tomatoes in the garden. For example, I live in USDA Hardiness Zone 4b, where the average first frost date is September 25th and the last frost date is around May 21st. Assume I have a seed packet that says “90 days to maturity.”

Best Season For Planting Tomatoes:

By counting back 90 days from September 25th, I’d need to plant seedlings in the garden after May 21st but before June 27th. Finding a date in that window with some wiggle room on either side, such as the first weekend in June, would be the safest bet.

Tomatoes have a wide range of growing times and many varieties to choose from. Some cultivars reach maturity in 50 days, while others can take up to 100 days.This information can be used to choose cultivars based on the number of days to maturity that will work well in your growing zone.

Choose a variety with a shorter number of days to maturity if you live in a cold climate or get a late start on your garden. You can use this information to determine when to start seeds indoors now that you know when to plant tomatoes in the garden.

When Should You Start Seeds Indoors?

There is some disagreement about when to start tomato seeds indoors. It is usually best to start them six to eight weeks before transplanting them outside. Many gardeners, on the other hand, start even earlier, up to 12 weeks before the anticipated transplant date, to give their seedlings more time to grow before planting them out.

While this will allow you to get a head start on the season, starting too early risks stressing and stunting young plants. The smallest seedlings I plant in the garden are frequently the ones that grow the largest and strongest.

Should You Start Seeds Indoors

When to begin depends on the climate of your indoor growing space as well as the cultivar chosen. Seedlings will germinate faster in a warm, humid environment with plenty of light, and six weeks may be sufficient. Temperatures between 65 and 85°F are ideal for tomato seedlings. Seeds should germinate in about a week at these temperatures. If you don’t have a warm, bright place to start your seeds, or if your growing season is extremely short, starting even earlier can be beneficial. Best for Planting Tomatoes

Start Seeds Indoors?

Plant seeds in two- to four-inch pots of lightweight seed starting mix, with a quarter-inch of soil covering the seeds. Mist the soil and keep it moist until sprouts appear. To accelerate germination, place your containers in a warm location or on a heat mat, and cover them with a humidity dome if you have one.

Remove the lid and place your pots in a sunny window or under grow lights for 10 to 14 hours per day once the seeds have germinated. Artificial grow lights are especially useful if you choose to start seeds early in the season when the days are still short. Maintain moist but not soggy soil. Bottom watering is the best method for watering tomato seedlings. Best for Planting Tomatoes

Start Seeds Indoors

Place the pots in a tray and add a half-inch of water to the bottom of the tray every few days when the soil feels dry. Allow the roots to soak up the water for about 10 minutes before draining any excess water from the tray. Transplant to four- to six-inch containers once they have developed a few sets of true leaves. When transplanting tomatoes, place them in the pot so that the lower third of the stem is buried in the soil. This will stimulate root growth, resulting in stronger, more robust plants.

If you started your seeds early, you may need to repot them in larger pots a second time before they are ready to be planted. It is critical that they do not become root bound. Harden off the seedlings once the soil temperature outside reaches about 50°F. Set the pots outside for an hour or so, increasing the length of time each day for a week or two until your plants have adapted to the outdoor conditions.

Planting in the Garden:

When the time comes to plant tomatoes in the garden, choose a location with well-draining soil that receives full sun, or just a little afternoon shade in hot climates. Work a few inches of compost into the soil of the garden bed. Dig deep holes 18 to 36 inches apart, burying the bottom two-thirds of each plant so that only the topmost leaves are visible above the ground.

Planting in the Garden

Fill in the holes, lightly tamping the soil around each one. Water thoroughly and mulch the base of each plant with a few inches of hay or straw, leaving a few inches bare around the stem. A close-up horizontal image of a young tomato seedling growing in the garden, surrounded by straw mulch.

Depending on the variety, you may need to add cages or stakes to keep them upright as they grow. Doing this when you plant is a great way to avoid damaging the roots after they have become established. Our comprehensive guide will teach you everything you need to know about growing and caring for tomatoes.

Growing Techniques for Abundant Harvests:

Because tomatoes require a few months of summer heat and sunshine for good yields, it doesn’t hurt to wait a few weeks after the last frost before planting them out if you live in a warm climate with a long growing season. A close-up horizontal image of a raised bed full of healthy tomato plants held up by bamboo stakes.
If you have the time and materials, you can start seeds indoors under grow lights as early as 12 weeks before transplanting them to larger pots outside. When growing in colder climates, look for varieties that mature in fewer days.

Timed to Perfection

So, when should you begin growing tomatoes? It may appear to be a simple question at first, but as you can see, the best time to plant tomatoes is dependent on a variety of factors. A close-up horizontal image of ripe tomatoes hanging on a vine, ready to be picked. Though it may take some research and observation to determine what is best for your garden, once you do, you may find yourself with more healthy and fruitful tomato plants than you can handle!

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