As the last frost begins to fade, March marks an ideal time to plant summer bulbs, setting the stage for a vibrant and stunning spring garden. This period allows gardeners to capitalize on the warmer weather, ensuring that their gardens are filled with color and life throughout the summer months. Here are some of the best bulbs to plant in March for a breathtaking display.
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choosing the right bulbs
When selecting bulbs for your spring garden, it’s essential to consider the types that thrive in warmer weather. Summer bulbs are less cold-tolerant and require protection from frost, making them perfect for planting once the risk of frost has passed. These include popular varieties like dahlias, gladiolus, and lilies, which offer a wide range of colors and textures to enhance your garden’s aesthetic appeal.
understanding summer bulbs
Summer bulbs are not all technically bulbs; they can be corms, rhizomes, or tuberous roots. These underground structures store energy and nutrients, allowing the plants to grow and bloom during the warmer months. They are ideal for gardens in zones where the soil has warmed up to around 55 to 60ยฐF (13 to 16ยฐC), ensuring optimal growth and flowering.
preparing your garden

Before planting, it’s crucial to prepare your garden by ensuring the soil is well-drained. Most summer bulbs prefer full sun and well-drained soil, which can be achieved by adding sand to heavy soils if necessary. Regular watering is also important, but overwatering should be avoided to prevent rot.
tips for planting
Here are some general tips for planting summer bulbs:
- Plant at the right depth: Generally, bulbs should be planted at a depth that is twice their height.
- Space correctly: The spacing between bulbs depends on their size and type. For example, smaller corms like freesias should be planted 2-3 inches apart, while larger bulbs like lilies require more space, typically 8-12 inches apart.
- Choose the right location: Ensure that your bulbs receive the appropriate amount of sunlight. Some bulbs, like begonias, prefer partial shade, while others, such as dahlias and gladiolus, thrive in full sun.
the five best bulbs to plant
Here are five of the best summer bulbs to plant in March for a stunning spring garden:
dahlia bulbs
Dahlias are a popular choice for summer gardens due to their vibrant flowers, which come in a wide variety of colors and sizes. They are perennials in warmer zones but can be dug up and stored in colder climates. Dahlias prefer full sun and well-drained soil, making them ideal for gardens with plenty of sunlight.
gladiolus bulbs
Gladiolus bulbs are known for their tall, colorful spikes of flowers that bloom in mid-summer. They are easy to grow and maintain, requiring full sun and well-drained soil. Gladiolus come in a range of colors, making them versatile for garden design.
lily bulbs
Lilies are renowned for their fragrance and beauty, offering a variety of colors and sizes. They are a bold choice for gardens, providing stunning displays in borders or containers. Lilies prefer well-drained soil and can tolerate partial shade, depending on the variety.
agapanthus bulbs
Agapanthus, also known as the African Lily, produces stunning clusters of blue flowers on tall stalks. It thrives in full sun and well-drained soil, making it a great addition to gardens with plenty of sunlight. Agapanthus is hardy in warmer zones but may require protection in colder climates.
calla lily bulbs
Calla lilies are elegant flowers often used in floral arrangements. They come in various colors and prefer full sun and rich, moist soil. Calla lilies are hardy in warmer zones but need to be dug up and stored in colder climates to protect them from frost.
maintaining your garden

Once your bulbs are planted, maintaining your garden involves regular watering and ensuring that the soil remains well-drained. It’s also important to protect your plants from pests and diseases, although many summer bulbs, like dahlias and gladiolus, are relatively pest and disease-resistant.
dealing with pests and diseases
While many summer bulbs are resistant to pests and diseases, it’s still important to monitor your garden for any signs of trouble. Common issues include aphids, slugs, and fungal diseases. Using organic or chemical controls as needed can help prevent these problems from spreading.
conclusion
Planting summer bulbs in March is a great way to ensure a vibrant and colorful garden throughout the warmer months. By choosing the right bulbs and following proper planting and maintenance techniques, you can create a stunning spring garden that will be the envy of your neighborhood. Whether you prefer the elegance of calla lilies or the vibrant blooms of dahlias, there’s a summer bulb to suit every garden style and preference.

Allan is a lifelong gardening enthusiast who still gets excited when the first seedlings pop up in spring. With a deep love for nature and a hands-in-the-soil approach, he shares practical tips, plant discoveries, and clever tricks picked up over years of digging, planting, and observing. Whether you’re a new gardener or have a shed full of tools, Allan writes like a neighbor whoโs always happy to swap cuttings and stories over the fence.
You can find more about Allanโs work on Malt or connect with him on LinkedIn.