Grow with confidence
Grand Junction Vegetable Planting Calendar
Use Grand Junction climate patterns to see this month’s garden tasks and crop-by-crop planting windows for southeast Colorado the warmer, semi-arid Western Slope and Grand Valley.
Plant through winter
Broccoli, lettuce, peas, carrots, radishes and leafy greens perform best from fall through early spring.
Use spring warmth
Use the short warm season efficiently: start tender crops indoors, wait for warm soil before planting outside, and sow hardy roots and greens again for fall harvests.
Restart the cool garden
Begin fall brassicas indoors and prepare beds for direct-sown roots and greens as temperatures moderate.
Local dates, crop by crop
Grand Junction Planting Dates
Choose a season and search for a crop to see when to start seeds indoors, move plants outside, direct sow and finish planting in the Grand Junction area.
Spring planting
Planting Dates for Spring
| Crop | Start seeds indoors | Transplant or plant outdoors | Direct sow outdoors | Last recommended planting | Shop |
|---|
No crops match that search.
Use the dates with confidence
How to Read This Calendar
Start indoors
Sow in trays under strong light. The window is timed so seedlings reach transplant size without becoming root-bound.
Transplant or plant
Harden seedlings off for about a week. Perennial crowns, sets and seed potatoes are included in this column.
Direct sow
Plant seed directly into prepared soil. Cool-season crops can begin before frost; heat-loving crops need warm soil.
Last planting
This is the practical end of the selected window—not a guarantee. Variety maturity and unusual weather can move it.
Keep soil working after harvest
Fall Cover Crop Planting Calendar
These windows are calculated from this city’s approximate first fall frost. Sow into an open bed after harvesting vegetables, then follow the selected crop’s product directions.
| Cover crop | Best for | Approx. planting window | Winter behavior |
|---|---|---|---|
| Buckwheat | Quick biomass · pollinators | Aug 6–Aug 20 | Frost-killed |
| Oats | Biomass · nutrient capture | Aug 6–Sep 3 | Usually winter-killed |
| Field Peas | Nitrogen · cool-season growth | Aug 6–Sep 3 | Often winter-killed |
| Daikon Radish | Compaction · nutrient capture | Aug 6–Sep 3 | Usually winter-killed |
| Crimson Clover | Nitrogen · pollinators | Aug 20–Sep 3 | Overwinters where adapted |
| Annual Ryegrass | Roots · erosion control | Aug 20–Sep 17 | Manage before seed set |
| Hairy Vetch | Nitrogen · spring biomass | Sep 3–Sep 17 | Overwinters in many areas |
| Cereal Rye | Erosion · weeds · biomass | Sep 3–Oct 1 | Very winter-hardy |
| Winter Wheat | Erosion · nutrient capture | Sep 3–Oct 1 | Winter-hardy |
Planting windows are planning estimates. Check the product page for seeding rate, regional adaptation, inoculation needs, and termination timing.
Grand Junction soil checkpoints
Let Soil Temperature Be the Final Check
Calendar dates start the conversation. A simple soil thermometer helps confirm that the seedbed is actually ready.
Selected for the current planting window
Seeds to Plant Now
References: Colorado State University Extension Vegetable Planting Guide, Sample Planting Guide for Raised-Bed Gardens, and Vegetable Gardening in the Mountains; USDA 2023 Plant Hardiness Zone Map; and Open-Meteo modeled soil-temperature data.