A good seed starting chart takes the guesswork out of one of the most important decisions in the vegetable garden — when to start each crop.
A reliable chart gives you the right timing for every vegetable, calculated from your last frost date.
Download our free printable seed starting chart below.
It covers all the major vegetable crops with indoor start dates, direct sow dates, and transplant windows.
Print it, laminate it, and keep it near your seed boxes.
It will be one of the most-used and helpful reference tools in your garden from now on.
Your seed starting chart works backward from a single date — your average last spring frost date.
Every timing recommendation on the chart is calculated from that date.
Before you use the seed starting chart, you need to know your frost date for your specific location.
If you do not know your frost date, use our free Zone Finder tool.
Enter your state and region and it will give you both your last spring frost date and your first fall frost date — the two most important dates in any vegetable gardener's calendar.
Once you have your last frost date, you are ready to use the seed starting chart.
If the seed starting chart says to start tomatoes six to eight weeks before last frost, and your last frost is May 15, you should start tomato seeds indoors between March 20 and April 1. It is that straightforward.
The seed starting chart does all the math — all you need is your date.
The vegetables that benefit most from an indoor start are the long-season warm-season crops.
Medium-term indoor crops on the seed starting chart include broccoli, cabbage, cauliflower, kale, and Brussels sprouts.
These brassicas need four to six weeks indoors and go out before the last frost date — they can handle light frost and actually grow better in cool weather.
Starting them indoors gives you larger, better-established transplants than direct sowing provides.
Cucumbers, squash, melons, and pumpkins appear on the seed starting chart as short-term indoor starts — just two to three weeks before the transplant date.
Their roots are sensitive to disturbance.
Starting them in individual peat or coir pots that go straight into the ground without disturbing the roots is the best approach.
A complete seed starting chart covers direct sowing as well as indoor starts.
Many vegetables grow better when sown directly in the garden rather than started indoors and transplanted.
Root vegetables — carrots, beets, parsnips, turnips, radishes — must be direct sown.
Their roots do not tolerate transplanting and will fork, twist, or fail if you try. The seed starting chart shows when to direct sow these crops based on soil temperature and your frost date.
Beans, peas, corn, and most salad greens are also best direct sown.
Peas go in the earliest — often four to six weeks before the last frost date, as soon as you can work the soil.
Beans and corn wait until after the last frost date when the soil has warmed.
Radishes can be sown almost anytime and are one of the fastest crops in the garden — a useful gap-filler between slower crops.
The seed starting chart makes the distinction between indoor starts and direct sow crops clear so you are never trying to transplant something that would rather be in the ground from the beginning.
Every seed starting chart includes transplant dates as well as indoor start dates.
Between starting seeds indoors and planting them outside is an essential step that gardeners sometimes skip — hardening off.
By the end of the hardening period, leave them out overnight if temperatures allow.
Seedlings that have been properly hardened off according to the seed starting chart timeline are noticeably sturdier than those that have not — they establish faster, resist stress better, and start producing sooner.
A seed starting chart is not just for spring. The same backward-counting principle applies to fall planting, using your first fall frost date instead of your last spring frost date.
Brassicas, — broccoli, kale, cabbage, and Brussels sprouts — planted in late summer for fall harvest , need to be started indoors in midsummer and transplanted out in time to mature before hard frost arrives.
The seed starting chart shows how many weeks before your first fall frost each crop needs to go in the ground, and you count backward from there to calculate your indoor start date.
Fall planting is one of the most underused strategies in the home vegetable garden.
Crops started in midsummer and harvested in fall often outperform their spring counterparts — cooler temperatures improve the flavor of most brassicas and leafy greens, and pest pressure is typically lower in fall than in spring.
Our seed starting chart is one of several free printables available on this site.
Our vegetable planting calendar gives you month-by-month planting windows for every major crop.
Our vegetable garden journal is the right place to record your actual start dates alongside the chart dates — comparing the two across seasons reveals the small timing adjustments that make each year better than the last.
For a customizable online seed starting chart based on your zip code — showing specific indoor start dates, direct sow dates, and transplant windows for your exact location — the Farmer's Almanac at farmersalmanac.com has an excellent interactive seed starting tool that complements our free printable seed starting chart.
Return to our Free Vegetable Garden Printables hub for all our free downloadable charts, calendars, planners, and worksheets.