Maryland summers bring heat and humidity that certain flowers handle better than others, ensuring vibrant gardens all season. Finding the best flowers to grow in maryland summer means picking plants that thrive in high temperatures, occasional drought, and heavy downpours. This guide covers top picks, planting tips, and care strategies for a colorful garden from June through September.
Maryland’s summer climate is classified as humid subtropical, with average highs in the 80s and 90s°F. Rainfall can be erratic, so flowers need resilience. The key is choosing native or well-adapted species that laugh at the heat.
Best Flowers To Grow In Maryland Summer
These flowers are proven winners for Maryland’s challenging summer conditions. They bloom reliably, resist pests, and require minimal fuss once established.
Black-Eyed Susan
Maryland’s state flower is a no-brainer. It’s drought-tolerant, blooms from June to frost, and attracts butterflies. Plant in full sun with well-drained soil. Deadhead spent blooms for continuous flowering.
Lantana
Lantana thrives in heat and humidity. Its clusters of yellow, orange, pink, or red flowers last all summer. It’s deer-resistant and needs little water once established. Use as a bedding plant or in containers.
Zinnia
Zinnias are heat-loving annuals that come in every color except true blue. They bloom from summer to frost and are easy from seed. Plant in full sun, water at the base to prevent powdery mildew.
Salvia
Salvia, especially ‘May Night’ or ‘Victoria Blue,’ handles Maryland summers well. Its spikes of purple or blue flowers attract hummingbirds. Cut back after first bloom for a second flush.
Portulaca
Also called moss rose, portulaca is a succulent that loves heat and poor soil. It blooms in bright colors and stays low, perfect for borders or rock gardens. Water sparingly.
Coneflower
Echinacea purpurea is a native perennial that tolerates drought and heat. Its purple daisy-like flowers bloom from midsummer to fall. Leave seed heads for winter birds.
Marigold
French and African marigolds are reliable summer bloomers. They repel some pests and thrive in full sun. Deadhead regularly for non-stop flowers.
Verbena
Verbena bonariensis is tall and airy, with purple flower clusters. It’s heat-tolerant and attracts butterflies. It self-seeds moderately, giving you more plants next year.
Cosmos
Cosmos are easy annuals that bloom in pink, white, and orange. They prefer poor soil and full sun. Too much fertilizer reduces blooms. They self-sow readily.
Sunflower
Annual sunflowers like ‘Mammoth’ or ‘Autumn Beauty’ love heat. Plant seeds directly in June for late summer blooms. They provide seeds for birds and a cheerful garden presence.
Planting Tips For Maryland Summer Flowers
Timing Is Everything
Plant after the last frost date, usually mid-May. For summer blooms, start seeds indoors 4-6 weeks earlier or buy transplants. Succession planting every 2-3 weeks extends the show.
Soil Preparation
Maryland soil varies from clay to sandy loam. Amend with compost to improve drainage and fertility. Most summer flowers prefer slightly acidic to neutral pH (6.0-7.0). Test your soil every few years.
Watering Wisely
Water deeply once or twice a week rather than shallow daily sprinkles. This encourages deep roots. Use soaker hoses or drip irrigation to keep foliage dry and prevent disease.
Mulching Matters
Apply 2-3 inches of organic mulch like shredded bark or straw. It keeps soil cool, retains moisture, and suppresses weeds. Keep mulch away from plant stems to avoid rot.
Care And Maintenance During Maryland Summers
Deadheading For More Blooms
Remove spent flowers regularly to encourage reblooming. For zinnias and marigolds, pinch off the entire flower head. For coneflowers, cut back to a leaf node.
Fertilizing Lightly
Too much nitrogen produces lush leaves but few flowers. Use a balanced, slow-release fertilizer at planting time. For container plants, use a liquid fertilizer every 2-3 weeks.
Pest And Disease Management
Common issues include aphids, spider mites, and powdery mildew. Spray with neem oil or insecticidal soap for pests. Improve air circulation to reduce mildew. Remove infected leaves promptly.
Supporting Tall Flowers
Stake tall varieties like sunflowers and cosmos early. Use bamboo stakes or tomato cages. Tie stems loosely with soft twine to avoid damage.
Native Maryland Summer Flowers
Native plants are adapted to local conditions and support pollinators. Here are top native choices for Maryland summers.
Butterfly Weed
Asclepias tuberosa has bright orange flowers that attract monarchs. It’s drought-tolerant and blooms from June to August. Plant in full sun with well-drained soil.
Cardinal Flower
Lobelia cardinalis thrives in moist soil and partial shade. Its red spikes bloom in late summer, attracting hummingbirds. It’s short-lived but self-seeds.
Joe-Pye Weed
Eutrochium purpureum grows 4-7 feet tall with pink flower clusters. It loves moist soil and blooms in late summer. It’s a butterfly magnet.
Wild Bergamot
Monarda fistulosa has lavender flowers and aromatic leaves. It tolerates heat and humidity, blooming from July to September. It can get powdery mildew, so space plants well.
Ironweed
Vernonia noveboracensis has deep purple flowers in late summer. It grows 4-6 feet tall and prefers moist soil. It’s a great late-season nectar source.
Container Gardening For Summer Flowers
Containers allow flexibility and can be moved to shade during heat waves. Use pots with drainage holes and quality potting mix.
Best Flowers For Containers
- Lantana
- Portulaca
- Zinnia (dwarf varieties)
- Verbena
- Marigold
- Calibrachoa
Container Care Tips
- Water daily during hot spells, sometimes twice a day.
- Fertilize every 2 weeks with liquid fertilizer.
- Use slow-release fertilizer at planting time.
- Group pots together to reduce evaporation.
- Move containers to shade during extreme heat.
Dealing With Maryland Summer Challenges
Heat Stress
Signs include wilting, leaf scorch, and reduced blooming. Water deeply in the morning. Provide afternoon shade for sensitive plants. Mulch to keep roots cool.
Humidity And Fungal Diseases
Powdery mildew and botrytis are common. Space plants for air circulation. Water at soil level. Remove infected leaves. Use fungicides if needed.
Heavy Rain And Storms
Maryland summer storms can flatten flowers. Stake tall plants. Use well-draining soil. After storms, gently shake off excess water from flowers.
Drought Periods
During dry spells, prioritize watering for new plants and containers. Established perennials may survive with less. Use rain barrels to collect water.
Extending The Bloom Season
With careful planning, you can have flowers from June through October. Here’s how.
Succession Planting
Sow zinnia and cosmos seeds every 3 weeks until mid-July. This ensures continuous blooms. Replace spent annuals with fall-blooming mums or asters.
Choosing Long-Blooming Varieties
Select flowers that bloom for months, like lantana, verbena, and salvia. Deadhead regularly to extend their season. Some perennials like coneflower bloom for 8-10 weeks.
Late Summer Planting
In August, plant cool-season flowers like pansies and snapdragons for fall color. They thrive in cooler nights and can last until frost.
Frequently Asked Questions
What are the best flowers to grow in Maryland summer for beginners?
Zinnias, marigolds, and black-eyed Susans are foolproof. They tolerate heat, need little care, and bloom profusely. Start with transplants for easiest success.
Can I grow roses in Maryland summer?
Yes, but choose heat-tolerant varieties like Knock Out or Drift roses. They need full sun, regular watering, and good air circulation. Mulch to keep roots cool.
How often should I water summer flowers in Maryland?
Most flowers need 1-2 inches of water per week. Water deeply 2-3 times a week during dry spells. Containers may need daily watering. Check soil moisture before watering.
What flowers attract pollinators in Maryland summer?
Butterfly weed, coneflower, salvia, and lantana attract bees and butterflies. Cardinal flower and trumpet vine attract hummingbirds. Plant a variety for continuous bloom.
When should I plant summer flowers in Maryland?
After the last frost, typically mid-May. For earlier blooms, start seeds indoors in April. You can also plant transplants in June for late summer color.
Final Thoughts On Maryland Summer Flowers
Choosing the right flowers makes Maryland summer gardening rewarding. Stick with heat-tolerant, low-maintenance varieties. Prepare soil well, water wisely, and deadhead regularly.
Your garden can be a vibrant oasis despite the heat. Start with a few proven winners, then expand each year. Enjoy the colors, the butterflies, and the satisfaction of a thriving summer garden.
Remember to adjust care based on your specific microclimate. Coastal areas may have more humidity, while inland spots get hotter. Observe your garden and adapt accordingly.
With these tips, you’ll have a stunning display all summer long. Happy gardening in Maryland!