When to Plant Beets in Colorado (2026 Guide)
Growing beets in Colorado can be incredibly rewarding, as these vibrant root vegetables thrive in a range of conditions. Colorado’s varied USDA hardiness zones mean careful attention is needed to ensure you're planting at the right time. For instance, in Zone 5b, the median last spring frost date is May 5, which sets the stage for successful planting.
Beets are known for their cold tolerance, which allows them to be sown early in cooler soils, even as cold as 40°F. In Colorado Springs, for example, the median last frost date is slightly later, on May 17, giving a narrow window for sowing. Understanding these dates will help you maximize your growing season while ensuring a bountiful harvest.
The most flavorful beets, often sweeter than those planted in spring, are typically harvested in the fall, particularly after the first frosts. In many areas of Colorado, such as Grand Junction which falls under Zone 6a with a first fall frost around October 16, this timing is crucial for optimal flavor development. Therefore, planning your planting schedule around these frost dates is essential.
Planting Schedule by USDA Zone in Colorado
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 5b | Not recommended — direct sow only. | Not recommended — direct sow only. | Start March 15 – April 10, ~2–3 weeks before May 5 | Harvest June 1 – October 1, ~60 days after seeding |
| Zone 5a | Not recommended — direct sow only. | Not recommended — direct sow only. | Start April 1 – April 20, ~2–3 weeks before May 17 | Harvest June 1 – September 27, ~60 days after seeding |
| Zone 6a | Not recommended — direct sow only. | Not recommended — direct sow only. | Start March 15 – April 20, ~2–3 weeks before April 25 | Harvest June 1 – October 16, ~60 days after seeding |
Beets Planting Windows in Colorado
- Indoor start: Beets should not be started indoors; they are best direct sown in the garden after your area's last frost date.
- Transplant outdoors: Transplanting outdoors is not recommended for beets, as they do not respond well to transplanting from indoor starts.
- Harvest: Beets can be harvested from June 1 until October 1 depending on planting times and frost dates, with fall beets offering a sweeter flavor.
Common Mistakes Growing Beets in Colorado
- One common mistake Colorado gardeners make is sowing beet seeds too deep. Plant them about 1 inch deep to ensure consistent germination. If planted too deep, their growth can be stunted due to the dense soil rather than the beneficial warm temperatures.
- Timing is crucial; many gardeners in Colorado overlook the critical frost dates, resulting in late planting or poor germination. By misjudging the frost dates, you may find that your beet harvest doesn't come in before the first fall frost hits, reducing sweet root development.
- Colorado's climate can bring dry spells that affect beet growth. Failing to provide consistent moisture can lead to tough, woody beets. Regular watering is essential, especially as roots develop. Consider using mulch to retain moisture in the soil during warm spells.
- Some gardeners mistakenly believe that indoor starting is an effective method for beets. In reality, beets struggle with transplant shock. Colorado's high altitude and fluctuating temperatures make direct sowing outdoors essential for health and yield.
- Lastly, many gardeners might plant beets in the same beds as spinach or chard without a rotation break. This can lead to downy mildew buildup in the soil, negatively impacting beet health. Rotating their placement each season is a smart way to manage pests and diseases.
Frequently Asked Questions
What if I’m in a cold pocket of Colorado?
If you're in a colder region, ensure you plant beets well after your last frost date, especially if your area experiences late snows. You can cover seedlings with floating row covers to protect them from unexpected cold snaps.
Can I still plant beets in May?
Yes, if you are in Zone 5b or 5a, you can direct sow beets until early May. Just be sure to keep an eye on frost forecasts and provide protection if needed.
How often should I water my beets?
Beets require consistent moisture for optimal growth. Water regularly, ensuring the soil remains moist but not waterlogged, especially as the beets start to grow larger.
When can I eat my beet greens?
You can start harvesting beet greens as soon as they reach a suitable size, generally around 4 to 6 inches tall. Regularly harvesting the greens will encourage further growth and healthier roots.
Are there specific pests I should watch for?
Yes, aphids and beet leafminers are common pests in Colorado. Monitor your plants closely and actively manage any infestations to ensure a healthy beet crop.
Keep Learning
City guides in Colorado
Other crops in Colorado
Typical fall sowing window for Beets in Colorado: July 7 – July 28.