Zone 4 has one of the shortest growing window for gardening in the US, With a last frost date of approx May 15th and first frost date of approx September 15. First and last frost days may vary by 2 weeks (or more depending on the weather).
Since the growing period for Zone 4 is so short, it is possible to extend your season by starting seeds indoors. A simple setup might be a shop light over a table or as elaborate as a heated greenhouse or multiple racks with lights.
We hope that our USDA Zone Specific SEED planting guide with be a helpful tool in your garden planning and planting!
FEBRUARY
Start seeds indoors for a greenhouse: Asparagus, Celery and Onion
MARCH
Start seeds indoors: Arugula, Asparagus, Broccoli, Brussels Sprouts, Cabbage, Cauliflower, Celery, Eggplant, Lettuce, Okra, Onion, Peppers and Rosemary
APRIL
Start Seeds indoors: Arugula, Cabbage, Eggplant, Okra, Peppers, Rosemary and Tomatoes
Start Seeds outside: Arugula, Basil, Beets, Broccoli, Brussels Sprouts, Cabbage, Carrots, Cauliflower, Cilantro, Collards, Dill, Endive, Horseradish, Kale, Kohlrabi, Lettuce, Onion, Oregano, Parsley, Peas, Radish, Rhubarb, Spinach and Turnips
Plant all herb and flower seeds outside
Transplant: Asparagus, Celery and Onion
MAY
Start Seeds indoors: Cabbage (late)
Start Seeds outside: Arugula, Beans: bush, pole, snap and lima, Beets, Broccoli, Brussels Sprouts, Cabbage, Carrots, Cauliflower, Celery, Chard, Collards, Corn: dent, field, popcorn & sweet, Cucumber, Endive, Horseradish, Kale, Kohlrabi, Lettuce, Melons, Muskmelon, Parsley, Parsnips, Peas, Pumpkin, Radish, Rhubarb, Rutabaga, Spinach, Summer Squash & Winter Squash, Tomato, Turnip and Watermelon
Plant all herb and flower seeds outside
Transplant: all remaining indoor seedlings
JUNE
Start Seeds outside: Arugula, Beans: bush, pole, snap and lima, Beets, Broccoli, Brussels Sprouts, Cabbage, Carrots, Cauliflower, Chard, Corn: dent, field, popcorn & sweet, Cucumber, Eggplant, Kale, Kohlrabi, Lettuce, Melons, Muskmelon, Okra, Peas, Peppers, Pumpkin, Radish, Rutabaga, Summer Spinach (malabar), Summer Squash & Winter Squash, Tomato and Watermelon
JULY
Start Seeds outside: Beans: bush, pole, snap and lima, Beets, Chard, Corn: dent, field, popcorn & sweet, Kale and Okra
AUGUST
Plant Seeds outside: Arugula, Kohlrabi, Lettuce, Radish, Spinach and Turnips
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6 comments
do you offer a paper catalog ?
This is very helpful to have everything listed out by month! The beginning of gardening season can be overwhelming, but this guide is great!
Looking for help to grow in 4b as well. Thanks!
Plant your garlic on Columbus Day for next season
I trying to grow a garden in mountain s
Needing all the help I can get to start a Garden in the zone 4b in the mountains of Colorado.