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Spring Outdoor Seed-Sowing Schedule

Seed sowing in drills1

Seed sowing in drillsHere’s a quick outdoor seed sowing schedule for spring. These suggestions are on the conservative side. Hardy vegetables can withstand frost and will grow best in cool weather, coming to maturity before the weather turns hot. Tender crops can not withstand frost. If you plant tender crops and frost threatens, use a cloche or row cover to keep them warm.

Approximate date of last spring frost:_________________________

Very Hardy Hardy Semi-hardy Tender Heat-loving
Sow 5-7 weeks  before last frost Sow 2-3 weeks before last frost Sow 1-2 weeks before last frost Sow on or just after last frost Sow 2-3 weeks after last frost
Dill Chervil Beets Beans Cantaloupe*
Garlic Coriander Broccoli* Corn Cucumber
Leeks Lettuce Brussels sprouts* Pumpkin Lima beans
Onions (seeds/sets) Mustard Carrots Summer squash Eggplants*
Peas Parsley Cabbage* Winter squash Peanuts
Shallots Turnip greens Cauliflower* Zucchini Peppers*
Spinach   Chard   Sweet potatoes
    Kale   Tomatoes*
    Kohlrabi   Watermelon

* Best as transplants: start indoors 6 weeks before transplanting to garden.


Written by Stephen Albert

Stephen Albert is a horticulturist, master gardener, and certified nurseryman who has taught at the University of California for more than 25 years. He holds graduate degrees from the University of California and the University of Iowa. His books include Vegetable Garden Grower’s Guide, Vegetable Garden Almanac & Planner, Tomato Grower’s Answer Book, and Kitchen Garden Grower’s Guide. His Vegetable Garden Grower’s Masterclass is available online. has more than 10 million visitors each year.


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    • Check with a local garden center or the nearby cooperative extension to find out when the average last frost date is where you live. In all likelihood the average last frost date in your part of Idaho will fall in the second or third week of May. And your first frost in fall will fall between the middle of September and the middle of October. That means you will have a growing season of 115 to 150 days or so. You can plan your season accordingly. You can extend the season by starting seeds indoors for planting out when temperatures are right for the crops you are growing or you can use a plastic hoop tunnel or cold frame to help extend the season.

How To Grow Tips

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How To Grow Peppers

How To Grow Broccoli

How To Grow Carrots

How To Grow Beans

How To Grow Corn

How To Grow Peas

How To Grow Lettuce

How To Grow Cucumbers

How To Grow Zucchini and Summer Squash

How To Grow Onions

How To Grow Potatoes

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