As March ushers in longer days and warmer weather, gardening enthusiasts are encouraged to prepare for summer by sowing flower seeds. This month presents an ideal opportunity to plant a variety of flowers that promise vibrant blooms throughout the warmer months. Growing flowers from seed not only enriches gardens but also offers a cost-effective alternative to purchasing young plants from garden centers.
To ensure a flourishing garden from spring through to autumn, consider these seven foolproof flower seeds to plant in March.
Zinnia: A Burst of Color
Zinnias are a top choice for adding vibrant color to summer gardens. These easy-to-grow flowers thrive in full sun and can produce blooms until the first frosts. For the best results, sow zinnia seeds directly into the garden soil, ensuring it has a crumbly texture. Space the seeds according to packet instructions and cover them lightly with soil. Once seedlings emerge, thin them to about 15 inches apart. If the March window is missed, zinnias can still be sown outdoors until late May. Alternatively, they can be started indoors in trays or pots of seed compost to gain an early advantage.
Sweet Peas: Scented Elegance
Sweet peas are renowned for their delightful fragrance and striking appearance. In warmer climates, these plants can be sown early in the season, even tolerating light frosts. For optimal growth, it is advisable to start sweet peas indoors. This year, try the Eckfords Finest Mix Heirloom variety, which features an array of colors including shell pink, maroon, and violet. Plant the seeds about half an inch deep in root trainers or biodegradable containers to support their long roots. After about three weeks, when seedlings are ready for larger pots, pinch out the central growing tip to encourage bushier growth.
Nigella: Filling Gaps with Ease
Nigella, also known as Love in a Mist, is perfect for filling gaps in summer borders. These hardy annuals can be sown successively every few weeks from spring through summer. Simply sprinkle the seeds in desired areas, cover them lightly with soil, and watch them sprout. Nigella is a resilient flower that thrives in cooler weather, making it suitable for fall planting as well. The seeds are adaptable to various soil conditions, provided it drains well.
Nasturtium: Vibrant and Edible
Nasturtiums are another excellent choice for March planting. These fast-growing plants can fill gaps in flowerbeds and, importantly, are edible. Sow nasturtium seeds directly in the garden after the last frost. They require a sunny location and free-draining soil. Germination typically occurs within 7 to 14 days, and seedlings should be thinned to about 14 inches apart. This year’s selection includes the ‘Troika Red’ variety, known for its long flowering season and appeal to pollinators.
Stocks: Scented Spires for Gardens
Stocks are celebrated for their sweet fragrance, making them a beloved addition to flower gardens. Although patience is required, as seeds sown now will bloom next summer, the effort is worthwhile. Stocks can be started indoors in March by scattering seeds on seed compost and covering them lightly. Once the seedlings develop two true leaves, they can be pricked out into pots and grown until they are ready for outdoor planting in early fall.
Poppies: Bold and Beautiful
Poppies bring a dramatic flair to gardens with their large, vibrant blooms. These flowers can be sown directly into the soil where they are to flower, provided it is well-prepared. Poppies prefer moist but well-drained soil and full sun, and they thrive when sown in staggered intervals throughout spring. For ease of planting, mix the small seeds with sand to prevent them from blowing away.
Coreopsis: Long-Lasting Blooms
Coreopsis, commonly known as tickseed, is a fantastic choice for those looking for long-lasting flowers. These native plants produce cheerful daisy-like blooms in yellow, red, or orange from summer to fall. Seeds can be sown directly into the ground or started in trays and later transplanted. The Li’l Bang™ Firewheel variety, with its striking red and golden-yellow flowers, is especially recommended for its ability to self-seed and return year after year.
As March unfolds, gardeners are encouraged to plan their sowing schedules carefully. By selecting a diverse range of flower seeds, enthusiasts can ensure a summer garden that is both beautiful and bountiful. For more tips on successful gardening, consider exploring common seed sowing mistakes to maximize your chances of success.
