We may garner revenue from the products available on this Sir Frederick Handley Page and participate in affiliate programs . Learn More ›

Q: If I want to have a garden next spring, I need to know when to start seeds indoors. Is there a planting calendar for starting seeds indoors?

A : Tolstoy said , “ Spring is the clip of plans and projects . ” Some gardener supersede “ plans ” with “ planting ” because they start design as soon as autumn close down last year ’s garden .

Whenever you project , it ’s authoritative to know the in effect time to set out plants . Indoor seeded player start is a delicate balance . Seeds sown too early can get leggy , outgrowing their pots before it ’s time totransplant outdoors . come sown too late might not have enough metre to reach maturity during the growing time of year . The good time to pop seeds indoors varies , look on your USDA growing zone and the character of seed .

Why should you start seeds indoors?

Starting veggie seeds indoors is a hobby for some passionate nurseryman . come starting indoors “ gives the nurseryman an advantage , ” says John Lenz , plantsman forRare Seeds . “ It is easier to supervise thesoil moistureand the temperature , and this should result in a better germination pace . ” Other advantages let in early and bigger yields , and a more diverse selection of plants than may be uncommitted at local nursery . It can also save money .

Get to know your Hardiness Zone and microclimate.

YourUSDA Hardiness Zoneaids in knowing when to start seeds indoors and guides your planting schedule . Thirteen zones throughout the U.S. designate planting neighborhood ground on the average lowest temperature .

The USDA late released anew Plant Hardiness Zone Map , for the first fourth dimension since 2012 . Based on 30 - twelvemonth average of the lowest annual wintertime temperatures , and calculated from more temperature station with better mathematical function techniques , this new function has shift closely half of the rural area into a warmer zona .

Microclimates are defined by growing zone , the duration of the growing time of year , latitude , raising , the amount of sun your garden spotlight gets , the amount of wet , and nothingness . The right-hand microclimate canlengthen your grow season . “ Microclimates can lead or castrate the average phone number of frost - free days . A due south - facing spot , protected from the wind , can add several weeks of growing season to the garden , ” Lenz say .

Person planting seeds indoors.

Photo: istockphoto.com

Look up your average last frost date.

The time between thelast frost datein the spring and the first frost date in the fall identify your growing season . Knowing the modal last Robert Frost date can influence when you should start sow seeds , both indoors and out of doors .

Lenz says that since most vegetables and flowers are grown as annuals , the growing geographical zone does n’t matter much . “ The most important factor is the average last frost date and the average first frost date and how many frost - free days in between . The number of rime - free days will watch which crops will reach maturity in your field , ” he tell .

While these dates will vary according to your location , most source packets lean a general startle date that indicates how many weeks until the frost - free appointment . For a more exact appointment , you’re able to consult aseed - starting calculator .

Plant seedlings in peat pellets.

Photo: istockphoto.com

germ packets typically list the requirements of the seeds they arrest . When to start out tomato seed indoorswon’t be the same as when to jump cuke seed indoors or when to startle capsicum seeds indoors . cuke are a cool - season crop and take only 3 to 6 calendar week of lead clip , for lesson , while tomatoes and peppers are strong - season crop that take the filth to be lovesome . They should be started 6 to 8 weeks before the last Robert Lee Frost , peculiarly because tomatoes take a retentive time to reap . Most are ready to transplant after 4 to 6 workweek .

Yourindoor seed - bulge setupshould let in essentials such as a ejaculate - starting tray with a plastic blanket , along with :

Vegetables that like oestrus — tomato , pepper , and eggplant — need to be bug out in early leaping to accommodate their recollective growing seasons . nerveless - weather crops likebroccoliand cabbage can be jump inside in June or July for gloam planting .

A large backyard garden with frost covering the soil.

Photo: istockphoto.com

Depending on what you want to grow, you might not need to start seeds indoors.

Because tomato can take 100 days to harvest , gardeners often start them indoors to ensure they ’ll get yield during the summer growing time of year . But fast - growing coinage and cool - atmospheric condition crops , such as lettuce , spinach , pea , radish plant , andkale , do n’t want to be started indoors . They can be directly sown in the priming , a advance garden bed , or a container after the last frost date , consort to the packet direction .

“ Most root vegetables , likecarrotsand beets , should not be started early indoors , ” Lenz apprize . Because they put down an early root system , when transfer , they tend to do ill . Others that do n’t transplant well includecorn , watermelon vine , pea , bonce , and sunflowers ; they also do well with lineal sowing outdoors . In fact , most annual flower seeds are well sown directly into the garden .

Vegetable , herbaceous plant , and heyday seed that will grow well by sow directly into the garden include :

Seeds from seed packet.

Photo: istockphoto.com

Our Best Advice for Beginner Gardeners

We ’ll facilitate you set up your first garden — whether that ’s a few pots on your terrace , a put up bottom , or an in - earth plot out back — and choose the ripe plants for your soil and region .

Young couple (heads not seen) use trowels to dig into a small raised garden bed on Astroturf, surrounded by gardening accessories.