Most bulbs are known for growing into breathtaking and beautiful flowers. In South Africa, we have some extraordinary plant species that can’t wait to show off their attractive array of colours. Which bulbs bloom in summer is a big question that is often asked by many. We provide some tips and info in our article below.

What Are Bulbs?

Bulbs are specialised underground storage organs that allow plants to survive through different seasons, particularly during harsh conditions. They store essential nutrients and energy, enabling the plant to regrow year after year. Commonly, bulbs are recognised by their layered structure, like that of an onion, but not all bulbs look the same. Some, such as corms, rhizomes, and tubers, differ in structure while serving a similar purpose. These clever adaptations not only sustain the plant but also contribute to their ability to produce stunning flowers seasonally, making them a firm favourite among gardeners.

Where do bulbs come from?

Bulbs are created when certain plant species disperse their nutrients and energy into the ground at the end of their growing seasons.  Most bulbs lie dormant during the winter months, storing their energy, waiting quietly for the warmer months before sprouting above the ground.

How to plant bulbs

Bulbs like loose soil that has a good drainage system. Sandy loam is a big favourite for getting the best out of your bulbs, as it provides the perfect soil. Planting bulbs is as easy as sticking your thumb in the ground creating a hole and gently covering the bulb with soil.  At the end of the flowering season, you can leave the bulbs in the ground, cutting back everything visible above the ground. The following year the bulbs will start growing all by themselves just as nature intended.

Proper spacing between bulbs is essential to ensure healthy growth and beautiful blooms. Overcrowding the bulbs can lead to competition for nutrients, water, and sunlight, which may result in weaker plants and fewer flowers. As a general rule, plant small bulbs around 5-8 cm apart and larger bulbs approximately 10-15 cm apart, depending on the variety.

Make sure to check the specific spacing recommendations for the type of bulb you are using. Leaving enough space not only allows the plants to thrive but also provides room for air circulation, reducing the risk of pests and diseases. Taking the time to give your bulbs adequate space will reward you with a vibrant and flourishing garden.

The depth at which you plant bulbs is crucial to their successful growth and blooming. For example, gladiolus bulbs should typically be planted about 10-15 cm deep, ensuring they are well-anchored to support their tall stems. On the other hand, calla lily bulbs require a shallower depth, usually around 5-10 cm deep, as they thrive closer to the soil’s surface.

When planting bulbs, a good rule of thumb is to plant at a depth that is approximately two to three times the height of the bulb. This allows the bulbs to establish firmly in the soil while protecting them from temperature fluctuations and pests. Always check the specific planting requirements for each bulb variety, as proper planting depth plays a critical role in their health and bloom quality.

Watering is a vital aspect of ensuring healthy growth and vibrant blooms for your bulbs. When first planted, bulbs require a thorough watering to help settle the soil around them and encourage root development. After this initial watering, it is important to maintain consistent moisture levels in the soil, but avoid overwatering, as this can lead to bulb rot and other issues. Generally, the soil should remain slightly damp but not waterlogged.

During periods of drought or particularly dry weather, additional watering may be necessary to support growth. Always consider the specific needs of the bulb variety you are cultivating, as some bulbs prefer drier conditions once established. Regularly check the soil to ensure it remains adequately moist, especially during critical growing phases.

How to Care for Bulbs

Planting and caring for bulbs requires a thoughtful approach to ensure their healthy growth and vibrant blooms. Begin by choosing a location with well-draining soil, as waterlogged earth can cause bulbs to rot. Autumn is usually the best time to plant most bulbs, giving them time to establish roots before winter. When planting, dig a hole approximately two to three times the depth of the bulb itself, placing the bulb with its pointed end facing upwards. Cover gently with soil and water lightly to settle the ground.

To care for bulbs, ensure they receive adequate sunlight, as most bulb plants thrive in sunny spots. Whilst watering, moderation is key; overwatering can do more harm than good. Fertilise sparingly during the growing season to encourage strong blooms, but avoid rich fertilisers during dormancy. Lastly, after flowering, allow the foliage to die back naturally, as it helps the bulb store energy for the next season. With patience and a little attention, bulbs will reward you with beautiful blooms year after year.

Bulbs that are easy to grow in a South African Summer

 

Gladiolus

You should plant Gladiolus bulbs in early Spring and in full sun. The beautiful string of flowers that erupt in the summer months will bring colour and beauty to your garden beds. Just like most bulbs Gladiolus come back every year if the bulbs are left in the ground after flowering.

Gladiolus are also highly popular as cut flowers due to their striking appearance and tall, elegant stems. They make a wonderful addition to floral arrangements, bringing vibrant colors and a touch of sophistication to any indoor space. Their long vase life means they can be enjoyed for days, making them a favorite choice for special occasions and home décor.

Gladiolus

Belladonna Lillies

Belladonna Lilies produce quite large flowers, resembling lilies, hence the name.  The flower stems grow straight out of the bulb, surrounded by the green leaves that the bulb first produces. At the end of each stem, you can expect to have on average 8 beautifully fragrant flowers. Soft shades of pink and white will offer your garden a gentle feel.

One of the remarkable qualities of Belladonna Lilies is their impressive resilience to drought conditions. These plants are naturally adapted to thrive in dry climates, making them an excellent choice for gardeners in regions with limited rainfall. Once established, they require minimal watering and can survive prolonged dry periods without significant impact on their health.

belladonna lillies

Dahlia 

Coming back every year just like most bulbs, Dahlia’s will give your garden a fun colourful look due to their pom pom like flowers. Available in a variety of different colours, including reds, yellows, pinks.  Sometimes if you are lucky enough to get your hands on the right bulbs, you can find two colours mixed together known as bi-colours.

Dahlias are not only a delight in the garden but are also highly prized for floral arrangements due to their striking appearance and vibrant colours. Their sturdy stems and wide range of sizes make them perfect for both simple and elaborate floral displays. Dahlias bloom from mid-summer through autumn, providing a long-lasting supply of flowers for cutting and arranging.

dahlia

Begonia 

Coming in beautiful shades of bright red, pink, yellow, orange and more.  Begonias are a wondrous bulb growing in shady garden areas, or even in a pot. Needing only a bit of sunlight daily, they are happy to grow in partially shady areas. Be sure to plant your bulbs in Spring just before the cold weather moves on. 

When planning a shady garden, it’s important to choose plants that thrive in lower light conditions while complementing each other aesthetically and functionally. Hostas are an excellent companion for Begonias, with their lush foliage providing a striking contrast to the vibrant Begonia blooms.

Ferns also make a wonderful choice, adding texture and a soft, natural feel to any shaded area. For a touch of elegance, consider pairing with Astilbes, whose feathery flowers bring height and additional colour to the shaded garden.

begonia

Calla Lily 

Calla Lily bulbs are quite hardy, and can generally be left in the ground throughout winter, provided there is no frost. South African weather will allow you to do just this, as long as the climate doesn’t change too much.  Loving full sun, your lilies are happiest outside in a sunny area. Typically coming in soft shades of white, you can also find pink, red and yellow Calla Lilies. 

Calla Lilies are not only admired for their beauty but also cherished for their deep symbolism. These elegant flowers are often associated with purity, rebirth, and devotion, making them a meaningful addition to any garden. Their striking appearance and delicate structure make them a popular choice for creating serene and sophisticated landscapes.

calla lilly

Pineapple Lilies 

Lilies are a popular bulb blooming in summer.  Pineapple lilies have incredibly unusual flowers. Just as their name says, when these lilies bloom they resemble little pineapples.  Not a fan of frost or cold weather, it is important to only plant these bulbs after the last cool weather of Spring. 

Pineapple lilies are not only admired for their quirky, tropical appearance but also for their unique appeal to pollinators. Their dense clusters of star-shaped flowers produce a sweet nectar that attracts bees, butterflies, and other beneficial insects. By planting these lilies, you can create an inviting environment for pollinators, supporting biodiversity and promoting a healthy garden ecosystem. However, do take care to position them in well-draining soil to prevent root rot, ensuring they thrive and continue to draw pollinators throughout the blooming season.

Pineapple Lilies

Come and visit us at Stanler Farms and pick out your favourite bulbs today!

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