If you’re a gardener in the Centennial State, knowing when to plant strawberries in Colorado is the first step to a succesful harvest. Getting the timing right is crucial for helping your plants establish strong roots and produce plenty of sweet berries in the coming seasons.
Colorado’s climate presents unique challenges, from late spring frosts to intense summer sun. But with the right schedule, you can grow strawberries successfully. This guide will walk you through the best times for planting, varietal choices, and the simple steps to get your patch started.
When to Plant Strawberries in Colorado
The best time for planting strawberries in Colorado depends on the type of plant you’re using. Generally, you have two main planting windows: spring and late summer.
For most gardeners, planting in early spring is the preferred method. You aim to get your plants in the ground as soon as the soil is workable. This is typically from late March through mid-April along the Front Range, and a few weeks later in higher mountain valleys.
Planting in spring allows the strawberries to establish themselves through the growing season. They’ll focus on growing leaves and roots, which sets them up for fruit production the following year. It’s a test of patience, but it leads to stronger plants.
The second window is late summer planting, specifically from early August to early September. This timing takes advantage of cooler fall temperatures and reliable moisture. The plants can settle in and develop roots without the stress of summer heat.
Fall-planted strawberries will be ready to produce a modest harvest the very next spring. This is a great option if you want berries a bit sooner. Just be sure to plant early enough that they have at least 6 weeks to establish before the first hard freeze.
Understanding Colorado’s Growing Zones
Colorado spans USDA Hardiness Zones 3 through 7. This huge range means your local frost dates are your best guide.
- Zones 5-7 (Front Range, Grand Junction): Last spring frost is often mid-to-late April. Target spring planting in April; fall planting in late August.
- Zones 3-4 (High Mountain Areas, San Luis Valley): Last spring frost can be in late May or even June. Plant in late May or early June for spring; aim for very early August for fall planting.
Always check your local frost dates. A surprise frost can damage new blossoms and set your plants back.
Choosing the Right Strawberry Type for Colorado
Picking a variety suited to your goals and climate is key. Strawberries fall into three main categories:
- June-Bearing: These produce one large, concentrated harvest in late spring or early summer. They are prolific and often have the best flavor. They send out many runners. Examples for Colorado: ‘Honeoye’, ‘Allstar’, ‘Sparkle’.
- Everbearing: They produce two to three smaller harvests—one in early summer, one in late summer, and sometimes one in fall. They produce fewer runners. Examples: ‘Ozark Beauty’, ‘Fort Laramie’.
- Day-Neutral: These will produce fruit continuously throughout the growing season, as long as temperatures stay between 35°F and 85°F. They are a good choice for consistent yields. Examples: ‘Tristar’, ‘Seascape’.
For beginners, June-bearing varieties are often the most reliable and productive in Colorado’s climate.
How to Plant Your Strawberries
Once you have your timing and variety, follow these steps for planting success.
- Site Selection: Choose a spot that gets at least 8 hours of full sun. Ensure the area has excellent drainage to prevent crown rot. Avoid places where tomatoes, potatoes, or peppers recently grew, as they can share soil diseases.
- Soil Preparation: Colorado soil often needs help. Work in 3-4 inches of compost or well-rotted manure to a depth of 12 inches. Aim for a slightly acidic soil pH between 5.5 and 6.8. A soil test can be very helpful here.
- Planting Depth (Critical): This is the most common mistake. The crown of the plant—where the leaves meet the roots—must be level with the soil surface. If it’s buried, it will rot. If it’s too high, the roots will dry out.
- Spacing: Space plants 18-24 inches apart in rows that are 3-4 feet apart. This gives them room for runners to fill in and ensures good air circulation.
- Watering In: Water each plant deeply immediately after planting. Apply a layer of straw mulch around the plants to conserve moisture, suppress weeds, and keep the berries clean.
Caring for Your Strawberry Patch
Consistent care through the year leads to the best harvests.
Watering
Strawberries need consistent moisture, especially during fruit development and in Colorado’s dry air. Provide 1-1.5 inches of water per week. Drip irrigation or soaker hoses are ideal, as they keep leaves dry and prevent disease.
Fertilizing
Feed your plants at planting time with a balanced organic fertilizer. For June-bearing types, fertilize again after the harvest is complete. For everbearing and day-neutral, a light feeding every 6 weeks during the season is beneficial. Avoid over-fertilizing, which leads to leafy growth instead of fruit.
Weeding and Mulching
Keep the area weed-free, as strawberries don’t compete well. Renew the straw mulch layer as needed, especially before winter. In fall, after a few hard freezes, add a fresh 2-3 inch layer of straw over the plants for winter protection. Remove this mulch in early spring when new growth begins.
Renovation (For June-Bearing Beds)
After harvest, mow or shear the foliage down to about 1 inch above the crowns. Thin the plants, keeping the healthiest ones about 6 inches apart. Remove old debris, fertilize, and water well. This process resets the bed for next year’s crop.
Common Problems and Solutions in Colorado
- Frost Damage: Use row covers or frost cloth if a late spring frost threatens after blossoms appear.
- Bird Netting: Birds love ripe berries. Cover your patch with netting as fruit begins to color.
- Gray Mold (Botrytis): Promote air flow with proper spacing and mulch. Avoid overhead watering. Remove any moldy berries immediately.
- Root Weevils/Spider Mites: These pests can be problematic. Encourage beneficial insects and use insecticidal soap if infestations are severe.
FAQ: Planting Strawberries in Colorado
Can I plant strawberry seeds in Colorado?
While possible, growing from seed is slow and challenging. It’s much more reliable to start with bare-root crowns or potted plants from a garden center. These will give you a head start by at least a year.
What is the best month to plant strawberries in Colorado?
For spring planting, April is generally the best month along the Front Range. For fall planting, aim for late August. Adjust slightly for your specific elevation and zone.
How do I protect my strawberries over the Colorado winter?
After the plants have gone dormant and the ground has frozen, apply a 3-4 inch layer of straw or pine needle mulch directly over them. This prevents freeze-thaw cycles that can heave plants out of the ground. Remove the mulch gradually in spring.
Can I grow strawberries in pots on a Colorado patio?
Absolutely! Use a large container with drainage holes and a quality potting mix. Day-neutral varieties are excellent for containers. Remember, potted plants dry out faster and may need watering daily in hot, windy weather. They also need winter protection, as pots freeze more quickly than ground soil.
Should I let my strawberries fruit the first year?
For spring-planted June-bearing strawberries, it’s best to remove the blossoms in the first year. This directs the plant’s energy to building strong roots and leaves, resulting in a much larger harvest next year. For everbearing and day-neutral, you can allow fall fruit to form on spring-planted stock.
Getting your strawberry planting timing right in Colorado sets the foundation for years of sweet rewards. By following these simple guidelines for when to plant and how to care for your patch, you’ll be well on your way to enjoying home-grown berries that are far superior to anything you can buy at the store. The key is matching your planting schedule to Colorado’s distinct seasons and providing consistent care.