Regional guide

Colorado Front Range and High Plains Garden

A soil-temperature-first guide for dry, variable spring conditions, fast cool-season windows, and tender crops that need reliably warm weather.

Climate signals

• Hardy cool-season vegetables can go in 2 to 4 weeks before the average last spring frost once the soil can be worked.
• Semi-hardy vegetables usually fit closer to the frost date and still depend on workable soil.
• Very tender crops generally wait at least two weeks after average last frost and consistent warm daytime weather.

Planning notes

• Prioritize cool-season roots and greens early, then shift beds to beans, cucumbers, squash, tomatoes, and peppers.
• Use soil temperature thresholds as the main go/no-go signal for direct seeding.
• Plan mid-summer brassica and greens sowings for fall quality in warmer parts of the region.

Catalog crop examples

These catalog entries match crops covered by the regional timing source; variety-specific details remain tied to each seed entry's own source.

• Early White Vienna Kohlrabi Vegetable · Cool · 55 days
• Danvers 126 Carrot Vegetable · Shoulder · 70 days
• Hollow Crown Parsnip Vegetable · Cool · 120 days
• Sugar Snap Pea Vegetable · Cool · 62 days
• Bloomsdale Spinach Vegetable · Cool · 42 days
• Provider Bush Bean Vegetable · Warm · 50 days
• Marketmore 76 Cucumber Vegetable · Warm · 58 days
• Roma Tomato Vegetable · Warm · 76 days

Related regional guides

• Colorado Front Range Container Vegetable Garden CSU Extension container vegetable guide for Front Range gardeners balancing container size, water, fertility, sun, and frost timing.
• Colorado High-Elevation Mountain Vegetable Garden CSU Extension mountain vegetable guide for Colorado gardeners over 7,500 feet who need short-season, frost-aware, cool-season planning.

Source: CSU vegetable planting guide