Colorado’s unpredictable spring weather makes late May the safest window for planting lantana in your garden. Knowing the best time to plant lantana in colorado is key to getting those vibrant blooms all summer long. Lantana is a heat-loving plant that struggles with cold, so timing is everything here.
This guide walks you through exactly when to plant, how to prep your soil, and what to watch out for. We’ll cover frost dates, microclimates, and even container growing tips. By the end, you’ll have a foolproof plan for lantana success in the Centennial State.
Best Time To Plant Lantana In Colorado
The ideal window for planting lantana in Colorado is from late May to early June. This timing ensures the soil has warmed up and the risk of frost has passed. Most Colorado gardens see their last frost between mid-May and late May, depending on your elevation.
Planting too early—like in April—can kill your lantana if a surprise freeze hits. Lantana is not frost-tolerant at all. Even a light frost will turn those pretty leaves black and mushy.
Why Late May Works Best
By late May, daytime temperatures regularly hit 70°F or higher in most Colorado regions. Nighttime lows stay above 50°F, which lantana needs to thrive. The soil temperature also reaches at least 60°F, encouraging strong root growth.
If you plant in early May, you risk cold soil that stunts growth. Lantana roots won’t spread well in chilly ground. Waiting until June is fine too, but you might miss some early summer blooms.
Checking Your Local Frost Dates
Colorado’s climate varies a lot by region. Denver’s last frost date is around May 10, but the mountains can see frost into June. Always check your specific area’s average last frost date before planting.
- Denver Metro: Last frost around May 10–15. Safe to plant after May 20.
- Colorado Springs: Last frost around May 15–20. Plant after May 25.
- Fort Collins: Last frost around May 10–15. Plant after May 20.
- Mountain towns (like Breckenridge): Last frost as late as June 10. Wait until mid-June.
- Western Slope (Grand Junction): Last frost around April 25–May 5. Plant after May 10.
Use a local extension office or online frost date calculator for your zip code. This gives you a precise target.
Understanding Colorado’s Climate Challenges
Colorado’s weather is famous for its swings. You might get a 70°F day in April followed by a snowstorm the next week. This unpredictability makes lantana planting a bit tricky.
Lantana is native to tropical regions, so it hates cold. It also loves full sun and well-draining soil. Colorado’s intense sun and dry air are actually great for lantana once it’s established.
Microclimates In Your Yard
Your garden might have spots that warm up faster than others. South-facing walls or patios absorb heat and create warmer microclimates. These areas can be planted a week or two earlier than the rest of your yard.
Conversely, low spots where cold air settles can stay frosty longer. Avoid planting lantana in these areas until the risk is fully gone. Raised beds also warm up faster than ground soil.
Elevation Effects On Planting Time
Higher elevations mean cooler temperatures and later springs. If you live above 6,000 feet, your growing season is shorter. You might need to wait until early June or even mid-June to plant lantana.
Lower elevations, like the Front Range, have longer seasons. But even there, a late May frost is possible. Always have frost cloth ready just in case.
Step-By-Step Planting Guide
Once you’ve picked the right time, follow these steps for the best results. Lantana is pretty forgiving, but proper planting sets it up for success.
Step 1: Choose Healthy Plants
Buy lantana from a nursery or garden center. Look for plants with bright green leaves and no yellowing. Avoid plants that look leggy or have wilted stems.
Popular varieties for Colorado include ‘Miss Huff’, ‘New Gold’, and ‘Bandana’ series. These are hardy and bloom well in our climate. Trailing types work great in hanging baskets.
Step 2: Prepare The Soil
Lantana needs well-draining soil. Colorado’s clay soil can hold too much water, leading to root rot. Mix in compost or sand to improve drainage.
- Dig a hole twice as wide as the root ball.
- Mix the removed soil with compost (about 50/50 ratio).
- Place the plant in the hole at the same depth it was in the pot.
- Backfill with the soil-compost mix.
- Water thoroughly to settle the soil.
Step 3: Space Properly
Lantana spreads out as it grows. Space plants 18 to 24 inches apart for ground cover types. Upright varieties need about 12 to 18 inches between them.
Overcrowding can lead to poor air circulation and disease. Give them room to breathe. In containers, one plant per 10-inch pot is plenty.
Step 4: Water And Mulch
Water newly planted lantana deeply once a week. After they’re established, they’re drought-tolerant. Mulch around the base with 2 inches of organic mulch to retain moisture and regulate soil temperature.
Avoid mulching too close to the stem, which can cause rot. Keep mulch a few inches away from the plant’s base.
Caring For Lantana After Planting
Once your lantana is in the ground, care is minimal. These plants are low-maintenance and thrive on neglect. But a few tips help them bloom their best.
Watering Schedule
Lantana prefers deep, infrequent watering. Water once a week during dry spells. In containers, you might need to water every 2-3 days in hot weather.
Check soil moisture by sticking your finger an inch deep. If it’s dry, water. If it’s still moist, wait. Overwatering is more dangerous than underwatering.
Fertilizing Tips
Lantana doesn’t need much fertilizer. Too much nitrogen leads to lots of leaves but few flowers. Use a balanced, slow-release fertilizer at planting time.
After that, a light feeding once a month with a bloom booster (like 10-30-20) can encourage more flowers. Stop fertilizing by late August to let the plant prepare for dormancy.
Pruning And Deadheading
Lantana blooms on new growth. Deadheading spent flowers encourages more blooms. You can also trim back leggy stems to keep the plant compact.
In late fall, cut the plant back to about 6 inches tall. This helps it survive winter if you’re overwintering it indoors. More on that below.
Common Problems And Solutions
Even with perfect timing, issues can arise. Here are the most common problems Colorado gardeners face with lantana.
Frost Damage
If a late frost catches your lantana, don’t panic. Cover plants with frost cloth or old sheets overnight. Remove the cover in the morning when temperatures rise.
If leaves turn black from frost, prune them off. The plant might recover from the roots if the damage isn’t severe. But repeated frosts can kill it.
Yellow Leaves
Yellow leaves often mean overwatering or poor drainage. Check your soil and adjust watering. If the plant is in a pot, ensure it has drainage holes.
Nutrient deficiencies can also cause yellowing. A light dose of liquid fertilizer can help. But usually, it’s a watering issue.
Pests
Lantana is generally pest-resistant. But whiteflies and spider mites can appear in dry conditions. Spray with insecticidal soap or neem oil if you see them.
Aphids might also show up on new growth. A strong blast of water from the hose often knocks them off. Avoid harsh chemicals that harm pollinators.
Overwintering Lantana In Colorado
Lantana is a perennial in warm climates, but it’s treated as an annual in Colorado. However, you can overwinter it indoors to save money and enjoy it next year.
Method 1: Bring Pots Indoors
If your lantana is in a container, bring it inside before the first frost. Place it in a bright, cool room (around 50-60°F). Water sparingly—only when the soil is dry.
It will go semi-dormant and lose some leaves. That’s normal. In spring, gradually reintroduce it to outdoor conditions after the last frost.
Method 2: Take Cuttings
Take 4-6 inch cuttings from healthy stems in late summer. Remove lower leaves and dip the cut end in rooting hormone. Plant in moist potting mix and cover with a plastic bag to create humidity.
Roots should form in 2-3 weeks. Keep the cuttings indoors over winter, then plant them out in spring. This is a great way to multiply your plants.
Method 3: Dig And Store Roots
For in-ground plants, dig up the root ball before frost. Trim the stems to 6 inches. Store the root ball in a box with peat moss or sawdust in a cool, dark place (40-50°F).
Check periodically for moisture. If the roots dry out, mist them lightly. Replant in spring after the last frost.
Container Planting For Flexibility
Growing lantana in containers gives you more control over timing. You can move pots indoors if frost threatens. This is ideal for Colorado’s unpredictable weather.
Choosing The Right Pot
Use a pot with drainage holes. Terracotta pots work well because they breathe and prevent overwatering. Plastic pots retain moisture longer, so water less often.
Size matters: a 12-inch pot is good for one plant. Larger pots hold more soil and stay warmer, which helps roots grow.
Soil Mix For Pots
Use a high-quality potting mix, not garden soil. Add perlite or sand for extra drainage. Lantana hates wet feet, so good drainage is critical.
You can also add a slow-release fertilizer to the mix at planting time. This feeds the plant for several months.
Placement And Care
Place containers in full sun—at least 6 hours of direct sunlight daily. South or west-facing spots are best. Rotate pots occasionally for even growth.
Container lantana needs more frequent watering than in-ground plants. Check daily during hot spells. But always let the soil dry out between waterings.
Companion Planting Ideas
Lantana pairs well with other heat-loving plants. It attracts butterflies and bees, making it a great pollinator plant. Here are some companions that thrive in Colorado.
- Salvia: Both love sun and dry conditions. Salvia’s spiky blooms contrast nicely with lantana’s round clusters.
- Zinnias: These annuals bloom all summer and attract butterflies too. They’re easy to grow from seed.
- Portulaca: A low-growing succulent that handles heat and drought. Great for ground cover around lantana.
- Russian Sage: A perennial that loves Colorado’s climate. Its purple flowers complement lantana’s bright colors.
- Marigolds: These deter pests and add cheerful color. They bloom from spring until frost.
Avoid planting lantana near shade-loving plants like hostas. They have different water and light needs. Group plants with similar requirements together.
Frequently Asked Questions
Can I plant lantana in Colorado in July?
Yes, you can plant lantana in July, but it will have less time to establish before fall. Water it more frequently during hot weather. It should still bloom until the first frost.
How late in the season can I plant lantana in Colorado?
You can plant lantana up to mid-August in most areas. After that, the plant won’t have enough time to root well before cold weather. Stick to late May through July for best results.
Does lantana come back every year in Colorado?
No, lantana is not winter-hardy in Colorado. It’s treated as an annual unless you overwinter it indoors. Some sheltered spots might allow it to survive a mild winter, but it’s rare.
What is the best lantana variety for Colorado?
‘Miss Huff’ is a popular choice because it’s more cold-tolerant than other varieties. ‘New Gold’ is great for ground cover. Trailing types like ‘Luscious’ work well in hanging baskets.
Should I fertilize lantana at planting time?
Yes, a light application of balanced fertilizer at planting helps roots establish. Use a slow-release formula to avoid burning the plant. Too much fertilizer can reduce blooming.
Final Tips For Lantana Success
Planting lantana at the right time is the most important step. Late May to early June is your sweet spot in Colorado. Watch the weather forecast and be ready to protect plants if needed.
Once established, lantana is incredibly rewarding. It blooms nonstop from June until the first frost. The bright flowers attract butterflies and hummingbirds to your garden.
Don’t forget to deadhead spent blooms for continuous color. And if you want to save money, try overwintering a few plants indoors. It’s easier than you think.
With a little planning, you can enjoy lantana’s beauty all summer long. Colorado’s climate might be challenging, but this tough plant is up for the task. Happy planting!