Colorado’s high elevation and dry air create unique timing challenges for clover planting success. Finding the best time to plant clover in Colorado depends on your specific region, elevation, and whether you choose spring or fall seeding. This guide breaks down exactly when and how to plant clover so you get thick, green coverage without wasting seed or effort.
Best Time To Plant Clover In Colorado
The ideal window for planting clover in Colorado is late summer to early fall, specifically from mid-August through mid-September. This timing allows seeds to germinate before winter dormancy while avoiding the intense heat of July. Spring planting works too, but you’ll face more competition from weeds and need consistent irrigation.
Why fall? Colorado’s summer heat stresses young clover seedlings. Fall planting gives them cool soil temperatures (55-65°F) and autumn rains. The seedlings establish roots before winter, then explode with growth the following spring. Spring planted clover often struggles with June’s heat and July’s dryness.
Why Fall Beats Spring For Colorado Clover
Fall planting aligns with Colorado’s natural precipitation patterns. August and September bring afternoon thunderstorms across the Front Range and Eastern Plains. These rains water your new clover without you having to drag hoses around. Spring is notoriously dry and windy in Colorado, making it hard to keep seeds moist.
Weed pressure is lower in fall too. Summer annual weeds like crabgrass and pigweed die off with the first frost. Your clover seedlings face less competition for sunlight and nutrients. Spring planting means fighting dandelions, bindweed, and other aggressive weeds from day one.
Soil temperature is another factor. Clover germinates best when soil temps are between 50-70°F. Colorado’s soil in late August sits perfectly in that range. Spring soil warms slowly, especially at higher elevations, delaying germination until June when heat stress becomes a problem.
Spring Planting Window: March To May
If you miss the fall window, spring planting is your second option. The best time for spring seeding is late March through early May, depending on your elevation. Lower elevations (below 5,000 feet) can plant in March. Higher elevations (above 6,000 feet) should wait until late April or early May.
Spring planting requires careful moisture management. Colorado’s spring winds dry out soil fast. You’ll need to water lightly but frequently—every 2-3 days—until seedlings are established. A light straw mulch helps retain moisture and prevents seed washing away in spring storms.
One advantage of spring planting: you can see bare patches and fill them in. Fall planting requires planning ahead because bare spots are hidden under snow by November. Spring also gives you a full growing season before winter dormancy.
Elevation Based Timing Guide
- Below 5,000 feet (Denver, Colorado Springs, Pueblo): Fall planting August 15-September 15. Spring planting March 15-April 30.
- 5,000-7,000 feet (Boulder, Fort Collins, Colorado Springs foothills): Fall planting August 20-September 10. Spring planting April 1-May 15.
- 7,000-9,000 feet (Estes Park, Evergreen, Woodland Park): Fall planting August 1-September 1. Spring planting May 1-June 1.
- Above 9,000 feet (Leadville, Breckenridge, Crested Butte): Fall planting July 15-August 15. Spring planting May 15-June 15.
Choosing The Right Clover Variety For Colorado
Not all clover varieties handle Colorado’s extremes equally. White Dutch clover and Ladino clover are the most reliable for lawns and ground cover. Red clover works better for pastures and erosion control. Alsike clover tolerates wetter soils but can be invasive.
White Dutch clover stays low (4-8 inches) and spreads by stolons. It handles foot traffic well and fixes nitrogen naturally. Ladino clover grows taller (12-18 inches) and produces more biomass, making it better for grazing or hay. Both varieties tolerate Colorado’s cold winters and dry summers once established.
Avoid crimson clover in Colorado. It’s an annual that dies after one season and struggles with our cold winters. Subterranean clover also performs poorly here. Stick with perennial white or red clover varieties bred for cold climates.
Where To Buy Clover Seed In Colorado
Local garden centers and feed stores carry varieties suited to your region. Big box stores often sell generic clover mixes that may not be cold-hardy. Look for seed labeled “cold tolerant” or “high altitude.” Online suppliers like Outsidepride and Hancock Seed offer Colorado-specific mixes.
Check the seed tag for germination rate and weed seed content. Colorado law requires seed tags to list this information. Avoid seed with more than 0.5% weed seed. Clover seed is small—about 60,000 seeds per pound—so a little goes a long way.
Step By Step Planting Guide
Follow these steps for successful clover establishment in Colorado:
- Test your soil pH. Clover prefers pH between 6.0 and 7.0. Colorado soils tend to be alkaline (pH 7.5-8.0). Add sulfur or peat moss to lower pH if needed. A soil test from CSU Extension costs about $25 and tells you exactly what your soil needs.
- Prepare the seedbed. Rake the area to remove rocks and debris. Loosen the top 2-3 inches of soil. Clover seeds need good soil contact to germinate. Don’t till too deep—clover has shallow roots.
- Inoculate the seed. Clover needs Rhizobium bacteria to fix nitrogen. Buy pre-inoculated seed or treat seed with clover-specific inoculant. This step is critical for Colorado soils that often lack native Rhizobium.
- Broadcast the seed. Mix seed with sand or sawdust (1 part seed to 4 parts carrier) for even distribution. Hand broadcast or use a handheld spreader. Target 1/4 to 1/2 pound of seed per 1,000 square feet for lawns, or 8-10 pounds per acre for pastures.
- Rake lightly. Drag a leaf rake over the seeded area to cover seeds with 1/8 to 1/4 inch of soil. Clover seeds need light to germinate, so don’t bury them deep. Rolling the area with a lawn roller improves soil contact.
- Water gently. Use a fine mist setting to avoid washing seeds away. Keep the soil consistently moist for 10-14 days until germination. After that, water deeply once a week.
Watering Schedule For New Clover
Colorado’s low humidity means you can’t skip watering. New clover needs moisture near the surface. Water daily for the first week if there’s no rain. Reduce to every other day in week two. By week three, water twice a week. Established clover needs about 1 inch of water per week during growing season.
Watch for signs of underwatering: leaf wilting, yellowing, or slow growth. Overwatering causes root rot and fungal diseases. Colorado’s clay soils drain slowly, so water less frequently but longer to encourage deep roots.
Common Colorado Clover Problems
Even with perfect timing, problems can arise. Here’s what to watch for:
- Frost heaving: Fall-planted clover can heave out of soil during freeze-thaw cycles. Mulch with straw after planting to insulate the soil. Plant at least 6 weeks before first frost so roots establish.
- Drought stress: Colorado’s summer droughts kill young clover quickly. Water deeply once a week during dry spells. Established clover goes dormant in extreme drought but recovers when rain returns.
- Weed invasion: Bindweed and thistle compete with clover. Hand pull weeds before they seed. Don’t use broadleaf herbicides—they kill clover too. Spot treat with glyphosate if needed, but avoid overspray.
- Pests: Clover mites and aphids sometimes appear. A strong spray of water knocks them off. Insecticidal soap works for severe infestations. Avoid broad-spectrum pesticides that kill pollinators.
When To Mow Clover
Mow clover after it flowers to encourage new growth. In Colorado, clover blooms in late spring and again in fall. Mow to 3-4 inches height. Don’t scalp clover—it needs leaf surface for photosynthesis. Leave clippings on the ground to return nitrogen to the soil.
If you want a pollinator-friendly lawn, let clover flower. Bees love clover blooms. Mow only when flowers fade to keep the area tidy. Clover lawns require less mowing than grass—once every 2-3 weeks during growing season.
Clover For Specific Colorado Uses
Your planting goal affects timing and variety choice:
Lawn Replacement
Plant white Dutch clover in fall for a low-maintenance lawn. It stays green with less water than grass. Mix with fine fescue for a more traditional look. Fall planting gives clover a head start over grass in spring.
Erosion Control
Red clover or alsike clover work best on slopes. Plant in early fall (August) so roots establish before winter. Use a higher seeding rate (1 pound per 1,000 square feet) for quick coverage. Mulch with erosion control blankets on steep slopes.
Pasture Or Hay
Ladino or red clover for livestock. Plant in spring (April-May) for summer grazing. Fall planting works too but may not produce harvest until next year. Inoculate seed heavily—pasture soils often lack Rhizobium bacteria.
Food Plots For Wildlife
Deer and elk love clover. Plant a mix of white and red clover in spring or fall. Add chicory or alfalfa for diversity. Fall planting provides winter forage that stays green under snow. Use exclosures to protect seedlings from browsing.
Frequently Asked Questions
Can I plant clover in Colorado in July?
July is too hot and dry for clover planting in most of Colorado. Soil temperatures exceed 80°F, which stops germination. If you must plant in summer, choose a shaded area and water daily. Success rates are low.
How long does clover take to grow in Colorado?
Germination takes 7-14 days with consistent moisture. Seedlings grow slowly for the first month as roots develop. By 6-8 weeks, clover forms a thick mat. Fall-planted clover goes dormant in winter but greens up quickly in spring.
Will clover survive Colorado winter?
Yes, perennial clover varieties survive Colorado winters down to -30°F. Snow cover insulates plants. In areas with little snow, mulch with straw after the ground freezes. Clover goes dormant but regrows from crown buds in spring.
Can I overseed clover into an existing lawn?
Yes, but mow the lawn short first and rake to expose soil. Broadcast seed and water well. Fall is best for overseeding because grass growth slows and clover has less competition. Avoid using lawn fertilizers high in nitrogen—they favor grass over clover.
How often should I water clover in Colorado?
Newly planted clover needs daily watering for 2 weeks. Established clover needs 1 inch of water per week from rain or irrigation. During Colorado’s dry spells, water deeply once a week. Clover tolerates drought better than grass but looks best with regular moisture.
Final Tips For Colorado Clover Success
Start with a soil test. Colorado soils vary wildly from clay to sandy loam. Adjust pH and nutrients before planting. Add compost if your soil is heavy clay—it improves drainage and provides organic matter.
Watch the weather forecast. Plant when rain is expected in the next 3-5 days. Colorado’s afternoon thunderstorms provide free watering. Avoid planting before a heat wave or prolonged dry spell.
Be patient with fall planting. Clover may not look like much before winter. It puts energy into root growth first. Come spring, those tiny plants explode into lush green coverage. Don’t overseed in spring thinking fall planting failed—wait until April to assess.
Consider a clover-grass mix. Pure clover lawns can look patchy in winter dormancy. Mixing with perennial ryegrass or fine fescue gives year-round green. Use a 80% grass, 20% clover ratio for a balanced lawn.
Finally, accept some imperfection. Clover goes dormant in extreme heat or cold. It may yellow in winter or thin out in drought. That’s normal for Colorado’s climate. Your clover will bounce back with rain and cooler temps.
Planting clover in Colorado isn’t complicated once you understand the timing. Late summer to early fall is your best bet. Spring works too if you’re diligent with watering. Choose the right variety, prepare your soil, and water consistently. Your Colorado clover will thrive with minimal fuss.