As winter’s chill recedes and the days gradually lengthen, March heralds the onset of the gardening season in the UK. This transitional month offers us gardeners the perfect opportunity to sow a variety of flowers and vegetables. This sets the stage for a vibrant and productive garden in the months to come. Knowing what to plant in March is the key.

Understanding the optimal plants to introduce during this period is crucial for achieving a flourishing garden. My comprehensive guide delves into the best flowers and vegetables to plant in March. I will provide insights tailored to the UK’s unique climate and conditions to help you understand more about the climate conditions for planting.

What Is Best To Plant In March?

Understanding March’s Climate in the UK

March in the UK is characterized by unpredictable weather patterns. While the promise of spring is evident, temperatures can fluctuate, and the risk of late frosts remains. Daylight hours increase, offering more sunlight, but gardeners must remain vigilant, protecting young plants from potential cold snaps. Soil temperatures begin to rise, making it feasible to sow hardy varieties directly outdoors. However, tender plants may still require indoor sowing or protection under cloches or fleece when transplanted outside.

Flowers to Plant in March

Pansies

Pansies are renowned for their cheerful, expressive faces and a vast array of colours. Their resilience to cooler temperatures makes them ideal for early spring planting. They can be sown directly into well-prepared beds or containers, thriving in both sun and partial shade. Regular deadheading ensures continuous blooms from spring through autumn. Their versatility allows them to complement various garden settings, from borders to hanging baskets.

Violas

Violas, closely related to pansies, offer smaller but equally captivating blooms. Their delicate appearance belies their hardiness, making them suitable for March planting. Preferring moist, well-drained soil and partial shade, violas are excellent for edging paths or filling gaps in flower beds. Their subtle fragrance adds an aromatic dimension to the garden, and like pansies, regular deadheading promotes prolonged flowering.

Sweet Peas

Sweet peas are cherished for their enchanting fragrance and climbing habit. Sowing sweet pea seeds indoors in pots during March allows for an early start, with seedlings ready for transplanting outdoors once the risk of frost has passed. Providing support, such as trellises or wigwams, enables these climbers to reach their full potential, rewarding gardeners with a cascade of scented blooms throughout the summer months.

Cornflowers

Cornflowers, with their striking blue petals, are easy to grow and excellent for attracting pollinators. They can be sown directly into the ground in March, preferring sunny locations with well-drained soil. Their tall stems make them suitable for the back of borders, and they also serve as excellent cut flowers, adding a touch of wild charm to floral arrangements.

Nigellas

Nigella, commonly known as Love-in-a-Mist, is a hardy annual that produces delicate blue or white flowers surrounded by feathery foliage. Sowing seeds directly into the soil in March ensures blooms by early summer. Nigella prefers full sun and well-drained soil, and its unique seed pods add interest to the garden even after flowering.

Calendulas

Calendulas are vibrant, hardy annuals that bring a splash of orange or yellow to the garden. They can be sown directly into the soil in March, thriving in full sun and tolerating a variety of soil conditions. Aside from their aesthetic appeal, calendulas attract beneficial insects such as bees and hoverflies. Their petals are also edible, making them a charming addition to salads and herbal teas.

Daffodils

Daffodils, a quintessential symbol of spring, can still be planted as potted bulbs in March. Although autumn is the ideal time for planting daffodil bulbs, purchasing pre-sprouted plants and transplanting them into borders or containers allows for an instant burst of golden colour. These perennials return year after year, naturalizing beautifully in lawns or woodland-style gardens.

Primroses

Primroses are another excellent choice for March planting. Their delicate, pastel-hued flowers brighten up flower beds, rock gardens, and containers. Preferring partial shade and moist soil, primroses are well-suited to woodland gardens or shaded areas under trees and shrubs. They are also an early food source for pollinators, making them a valuable addition to a wildlife-friendly garden.

Geraniums

Hardy geraniums, or cranesbills, are reliable perennials that can be planted in March. With their diverse range of colours and adaptable nature, they are excellent for filling gaps in borders or cascading over walls. Once established, they require minimal maintenance and provide long-lasting blooms throughout the summer months.

Vegetables to Plant in March

March is an exciting month for vegetable gardeners, as it marks the beginning of the outdoor sowing season. With careful planning and some protection from frost, a wide range of vegetables can be planted now for a bountiful harvest later in the year.

Carrots

Carrots are a staple in many gardens, and early varieties such as ‘Nantes’ or ‘Amsterdam Forcing’ can be sown directly into the ground in March. Choosing a sunny location with well-drained, sandy soil helps prevent the roots from becoming misshapen. Covering the rows with fleece can protect emerging seedlings from chilly temperatures and carrot fly infestations.

Radishes

Radishes are one of the quickest-growing vegetables and are perfect for sowing in March. They can be harvested in as little as four weeks, making them an excellent choice for impatient gardeners. Radishes thrive in loose, well-drained soil and do well in both garden beds and containers. Their peppery flavour adds a zesty crunch to salads.

Broad Beans

Broad beans are another excellent choice for early sowing. Hardy and resilient, they can be sown directly into the ground or in pots for transplanting later. They thrive in rich, well-drained soil and require staking as they grow. Broad beans not only provide a delicious harvest but also improve soil fertility by fixing nitrogen, benefiting future crops.

Spinach

Spinach is a nutrient-dense leafy green that can be sown in March. Varieties such as ‘Giant Winter’ and ‘Perpetual Spinach’ are well-suited to early planting. Growing spinach in partial shade prevents premature bolting, ensuring a steady harvest of tender leaves. Adding mulch helps retain soil moisture and keeps weeds at bay.

Peas

Peas, particularly early varieties like ‘Meteor’ or ‘Kelvedon Wonder,’ can be sown outdoors in March. These cool-season crops thrive in well-drained soil with plenty of organic matter. Providing support, such as pea sticks or trellises, encourages healthy growth and makes harvesting easier. Peas also enrich the soil with nitrogen, benefiting neighboring plants.

Lettuce

Lettuce varieties such as ‘Little Gem’ and ‘Lollo Rosso’ can be sown in March for an early crop. These fast-growing greens prefer cooler temperatures, making them ideal for spring planting. Regular watering prevents bitterness, and sowing seeds successively every few weeks ensures a continuous harvest throughout the season.

Spring Onions

Spring onions, or scallions, are easy to grow and add a mild onion flavour to salads and stir-fries. They can be sown directly into the soil in March and require little maintenance. Harvesting them young prevents them from becoming too strong in taste.

Leeks

Leeks are a long-growing crop, and starting them in March ensures a robust harvest later in the year. Sowing seeds in a seed tray or a sheltered bed allows them to develop before being transplanted into their final growing position in early summer. Regular watering and earthing up produce thick, white stems.

Beetroot

Beetroot is another fantastic choice for March planting. Varieties like ‘Boltardy’ are well-suited to early sowing. Beetroot prefers well-drained soil with moderate fertility, and thinning seedlings ensures larger, sweeter roots. Young beet leaves can also be harvested and used in salads.

Tips for Successful March Planting

By choosing the right flowers and vegetables to plant in March, gardeners can create a vibrant, productive space that thrives throughout the year. Whether sowing hardy blooms for a colourful display or starting a vegetable patch for fresh, homegrown produce, early spring gardening sets the foundation for a rewarding growing season.

With patience, care, and a little protection from the elements, March planting ensures a beautiful and bountiful garden in the months ahead

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