Denver Plants

Safe Planting date for Garden Vegetables 

This is a difficult question to answer... but on average we will see our last frost somewhere between May 15th to May 25th. As you are well aware... in Colorado it can snow in June or September.

The table below lists the approximate dates for safe planting of vegetable seeds and pre-started vegetable plants.

Vegetable Approximate safe Date
Artichokes May 15 to May 25
Asparagus from Seed
Asparagus from Crowns
May 15 to May 25
April 1 to April 30
Beans - Bush and Pole May 15 to May 25
Beans - Lima and Butter May 15 to May 25
Beets May 4 to May 18
Broccoli April 20 to May 5
Brussels Sprouts April 20 to May 5
Cabbage from pre-starts April 20 to May 5
Cantaloupe May 15 to May 25
Carrots May 4 to May 18
Cauliflower April 20 to May 5
Celery from pre-starts May 4 to May 18
Collard Greens April 20 to May 5
Corn May 15 to May 25
Cucumbers May 15 to May 25
Eggplant May 15 to May 25
Garlic October
Kohlrabi April 20 to May 5
Leek April 20 to May 5
Lettuce April 20 to May 5
Mustard Greens April 20 to May 5
Okra May 15 to May 25
Onions for sets April 1 to April 30
Peas April 20 to May 5
Peppers May 15 to May 25
Potatoes 
Potatoes - Sweet
April 1 to April 30
May 15 to May 25
Pumpkins May 15 to May 25
Radishes May 4 to May 18
Rhubarb April 1 to April 30
Rutabaga April 20 to May 5
Shallots Plant in fall or April 20 to May 5
Spinach April 20 to May 5
Strawberries from crowns April 1 to April 30
Squash May 15 to May 25
Tomatoes May 15 to May 25
Turnips April 20 to May 5
Watermelons May 15 to May 25

 

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