Pennsylvania’s March planting requires flowers that tolerate lingering snow and frost while still producing spring color. Finding the best flowers to plant in march in pennsylvania means choosing hardy varieties that can handle temperature swings from freezing nights to warm afternoons. Many gardeners make the mistake of planting too early, only to lose blooms to a late frost. But with the right picks, you can enjoy early color even when winter refuses to fully let go.
This guide covers flowers that thrive in Pennsylvania’s unique March conditions. You’ll learn which blooms can handle cold soil, unexpected snow, and the state’s variable climate. We’ll also cover planting tips to give your flowers the best start.
Best Flowers To Plant In March In Pennsylvania
March in Pennsylvania is a tricky month. Some days feel like spring, others remind you winter is still hanging around. The key is selecting flowers that are cold-tolerant and can handle wet soil from melting snow. Here are the top performers for your garden.
Pansies
Pansies are the champions of early spring planting. They can survive temperatures down to about 25°F, making them perfect for Pennsylvania’s March unpredictability. Plant them in well-drained soil after the ground thaws. They come in nearly every color, from deep purple to bright yellow.
- Plant spacing: 6-8 inches apart
- Sun needs: Full sun to partial shade
- Blooming time: March through May
- Watering: Keep soil moist but not soggy
Snapdragons
Snapdragons are another cold-hardy choice. They can handle light frost and even a dusting of snow. In Pennsylvania, they often bloom from late March into June. Tall varieties make great cut flowers, while shorter ones work well in borders.
- Choose a sunny spot with good drainage
- Sow seeds directly after last hard frost
- Water at the base to prevent mildew
- Deadhead spent blooms for continuous flowers
Violas
Violas are smaller cousins of pansies but even more cold-tolerant. They bloom profusely in cool weather and can handle temperatures as low as 20°F. They self-seed easily, so you might see them return next year. Plant them in containers or garden beds for early color.
Primroses
Primroses are perennials that bloom in early spring. They prefer cooler temperatures and moist soil. In Pennsylvania, they often start flowering in late March. They come in shades of pink, purple, yellow, and white. Plant them in partial shade for best results.
Daffodils
Daffodils are bulbs planted in fall, but they bloom in March. If you missed fall planting, you can buy potted daffodils from nurseries and transplant them. They are deer-resistant and come back year after year. They thrive in full sun to light shade.
Hyacinths
Hyacinths are fragrant bulbs that bloom in early spring. They can handle cold soil and light frost. Plant them in clusters for maximum impact. Their strong scent attracts early pollinators like bees. They work well in borders or containers.
Sweet Alyssum
Sweet alyssum is a low-growing annual that tolerates cool weather. It produces tiny white, pink, or purple flowers. It can handle light frost and blooms from March through May. Use it as a ground cover or border plant.
Calendula
Calendula, also called pot marigold, is a hardy annual. It can survive temperatures down to 25°F. It blooms in shades of orange and yellow. Calendula is edible and has medicinal uses. Plant it in full sun for best flowering.
Planting Tips For March In Pennsylvania
Planting in March requires some extra care. The soil is often cold and wet. Here are practical tips to help your flowers thrive.
Check Soil Temperature
Soil temperature matters more than air temperature. Use a soil thermometer to check. Most cool-season flowers need soil at least 40°F. If the soil is too cold, seeds may rot. Wait until the ground thaws completely.
Prepare The Soil
Pennsylvania soil can be heavy clay. Amend it with compost or aged manure. This improves drainage and adds nutrients. Work the soil when it’s dry enough to crumble. Wet soil compacts easily and harms roots.
Protect From Frost
Late frosts are common in March. Cover young plants with row covers or old sheets at night. Remove covers in the morning. This protects blooms without trapping heat. You can also use cloches or plastic jugs cut in half.
Water Carefully
March soil is often moist from snow melt. Overwatering can cause root rot. Water only when the top inch of soil feels dry. Early morning watering is best. Avoid wetting the foliage to prevent disease.
Use Mulch
Mulch helps regulate soil temperature. It keeps roots cool during warm days and insulates them during cold nights. Use a 2-inch layer of straw, shredded leaves, or bark. Keep mulch away from plant stems.
Regional Considerations For Pennsylvania
Pennsylvania has diverse climates. Eastern parts near Philadelphia are warmer. Western areas near Pittsburgh are colder. Northern regions near the Poconos have longer winters. Adjust your planting times based on your local zone.
Southeastern Pennsylvania
This region is in USDA zones 6b to 7a. March temperatures average 30-50°F. You can plant pansies, violas, and snapdragons earlier. Soil warms faster here. Watch for sudden warm spells that trigger early growth.
Central Pennsylvania
Central areas are zones 6a to 6b. March is colder with more frost days. Focus on cold-hardy flowers like primroses and daffodils. Wait until mid-March for most planting. Use frost protection for tender plants.
Western Pennsylvania
Western PA is zones 5b to 6a. March is often snowy and cold. Stick with the toughest flowers like pansies and violas. Plant in raised beds for better drainage. Consider starting seeds indoors for later transplanting.
Northern Pennsylvania
Northern regions are zones 5a to 5b. March is still winter here. Focus on bulbs already in the ground. For new plants, wait until April. Use cold frames or greenhouses for early starts.
Common Mistakes To Avoid
Even experienced gardeners make errors in March. Here are pitfalls to skip.
Planting Too Early
It’s tempting to plant as soon as the snow melts. But cold soil and late frosts can kill tender plants. Wait until the ground is workable and temperatures are consistently above freezing. Check your local frost dates.
Overwatering
March soil is naturally wet. Adding extra water can drown roots. Let the soil dry between waterings. Use well-drained soil or raised beds. If you see yellowing leaves, reduce watering.
Ignoring Hardiness Zones
Not all flowers labeled “early spring” are suitable for Pennsylvania. Check the plant tag for zone compatibility. Some flowers need warmer climates. Stick with varieties rated for zones 5-7.
Skipping Soil Preparation
Poor soil leads to weak plants. Take time to amend with compost. Test soil pH if possible. Most flowers prefer pH 6.0-7.0. Adjust with lime or sulfur as needed.
Frequently Asked Questions
Can I plant tulips in March in Pennsylvania?
Tulips are best planted in fall. But you can buy potted tulips and transplant them in March. They may not bloom as long as fall-planted ones. Choose cold-hardy varieties.
What flowers bloom in March in Pennsylvania?
Pansies, violas, daffodils, hyacinths, and primroses bloom in March. Snowdrops and crocuses also bloom early. These flowers can handle cold and light snow.
Is it too early to plant annuals in March?
It depends on the annual. Cool-season annuals like pansies and snapdragons are fine. Warm-season annuals like petunias and marigolds should wait until May. Check the plant label for cold tolerance.
How do I protect flowers from late frost?
Use row covers, old sheets, or plastic cloches. Cover plants in the evening and remove in the morning. Water the soil before a frost to retain heat. Mulch also helps insulate roots.
Can I plant seeds directly in March?
Yes, for cold-hardy flowers like calendula and sweet alyssum. Sow seeds after the soil thaws. For tender flowers, start seeds indoors and transplant later. Follow seed packet instructions for depth and spacing.
Conclusion
March planting in Pennsylvania is all about choosing the right flowers and protecting them from weather swings. Pansies, violas, snapdragons, primroses, daffodils, hyacinths, sweet alyssum, and calendula are your best bets. They can handle cold soil, frost, and even light snow. Prepare your soil well, water carefully, and use frost protection when needed. With these tips, you can enjoy early spring color even when winter refuses to leave. Start small, observe your garden’s microclimate, and adjust as you learn. Your March garden can be beautiful and resilient.