Start tomato seeds indoors or in a greenhouse before planting season. You can save money and choose a bigger variety of tomato varieties to grow. (More tips for growing your own tomato seedlings.)
If you start your own tomato seedlings, then when spring comes your plants will be ready to plant outdoors. Plus you'll grow a more successful crop than if you sow seeds directly in the garden.
But when should you start yours?
By mid-winter, most gardeners are itching to get growing. Here's where you need patience.
Start too early and your plants will outgrow their pots quickly and become leggy, root-bound, and weak. They’ll spend their first weeks in the garden regaining strength, rather than producing new leaf growth and flowers.
Start your seeds late and you can have a delayed crop.
Timing your tomato seed starting is not a one-size-fits-all. Much depends on your climate.
Start dates differ from region to region ... even within a gardening zone.
Try these 2 easy steps to calculate the best time to start your seeds where you live.
1. Determine the last frost date for your region. If you’re not sure, contact your local extension office. You can also view the freeze/frost information provided by the National Climatic Data Center.
2. Count back 4-6 weeks. Your last frost date is a guideline. Use it combined with current conditions. Count back from the last frost date for your region to determine when to start your tomatoes. Remember: tomatoes like to be warm, so if the extended forecast is cool and wet then err on the side of waiting a little longer.
Waiting longer to plant after the last frost date will reduce the chance of losing your tomato crop to freeze and will allow the ground to warm – which is the kind of environment in which tomatoes do best!
The last frost date in upstate South Carolina: April 15
Ideal tomato seed starting date: March 1
When to plant tomato seedlings: April 25-May 7
Dear Tomato Dirt,
Why should I wait a couple of weeks after the last frost date to plant my seedlings in the garden? I want to get my tomato plants in the ground as soon as I can so I can have the first tomato on the block.
Sincerely, Itchy Garden Gloves
Tomatoes like hot weather. They don’t like wet feet and they don’t like to be cold. Give the ground a chance to warm up and your tomatoes will reward you. Go with the calendar even if you're impatient.
If you absolutely must plant early, then use the “Black Plastic Trick.” Two to three weeks before setting tomatoes in the garden, cover your planting area with black garden plastic. Black absorbs heat from the sun and will warm your soil more quickly than if it is left to nature’s devices.
Sincerely, Tomato Dirt
More Tips for Starting Tomato Seeds
Grow tomatoes from seeds: what you need to know
Seed starting containers to use when you sow tomatoes
What seed starting mix to use for growing tomato seeds ...
Seed starting mix for tomatoes: what ingredients are important ...
Review: Pro-Mix Seed Starting Formula for growing tomato seeds ...
How to germinate seeds to get best results when growing tomatoes
How to label and grow tomatoes from seed ...
How to plant tomato seeds ...
Tomato growing tips for seeds ...
Learn what tomato seedlings need after they germinate
Re-potting tomato seedlings to a bigger container ...
Strengthen a growing tomato plant to prepare it for the home garden
Return from Tomato Seeds: When Should You Start Them? to Tomato Dirt home
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