Gladiolus, with their tall, striking spires of vibrant blooms, are a showstopper in any garden. But to truly maximize their beauty and health, smart companion planting can make a significant difference. Choosing the right companions can deter pests, improve soil health, and create a visually stunning display. This guide explores the best plants to grow alongside gladiolus, answering common questions gardeners often have.
What are the best companion plants for gladiolus?
The best companion plants for gladiolus are those that offer complementary benefits without competing for resources. Ideal companions often address gladiolus's vulnerabilities, such as susceptibility to certain pests and diseases. Here are some excellent choices:
Marigolds: These cheerful flowers are known for their pest-repelling properties. Their strong scent deters nematodes, aphids, and whiteflies, all of which can harm gladiolus. The bright colors also complement gladiolus beautifully.
Nasturtiums: Similar to marigolds, nasturtiums act as a natural pest deterrent. They attract aphids and other insects away from your gladiolus, protecting them from damage. Their edible flowers and leaves add another layer of garden enjoyment.
Calendula: Calendula, with its bright orange and yellow blooms, offers similar pest-repelling benefits as marigolds and nasturtiums. They also help improve soil health, making it more beneficial for your gladiolus.
Salvia: Salvia's tall, spiky flowers provide a lovely contrast to the gladiolus's more elegant blooms. They also attract beneficial insects like pollinators, which can help boost gladiolus flower production.
Low-growing herbs: Herbs like thyme, rosemary, and oregano thrive in well-drained soil, similar to gladiolus. Their aromatic foliage can deter some pests. They also add a pleasing scent to the garden and can be harvested for culinary use.
What should you NOT plant with gladiolus?
While many plants complement gladiolus, some should be avoided. Heavy feeders and those prone to the same diseases can compete with your gladiolus for resources or increase the risk of infection.
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Plants with high nitrogen needs: Avoid planting heavy feeders near gladiolus, as they'll compete for nutrients in the soil. This can result in weaker gladiolus growth and fewer blooms.
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Plants susceptible to the same diseases: Gladiolus are prone to certain fungal diseases. Planting species susceptible to similar diseases increases the risk of infection spreading.
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Plants that shade gladiolus: Gladiolus need plenty of sunlight to thrive. Avoid planting taller plants that could shade them and inhibit their growth.
What flowers go well with gladiolus?
Beyond the pest-deterring companions mentioned earlier, several flowers create visually stunning combinations with gladiolus. Consider these options to enhance the aesthetic appeal of your garden:
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Cosmos: The delicate, airy blooms of cosmos complement the more structured form of gladiolus, creating a visually interesting contrast.
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Zinnias: The vibrant colors and cheerful nature of zinnias make them an excellent companion for gladiolus. Their different heights and bloom times can create layers of visual interest.
Do gladiolus need support?
Yes, many gladiolus varieties, especially the taller ones, benefit from staking or support. Their tall stems can easily bend or break under their own weight, especially in windy conditions. Support helps keep the blooms upright and prevents damage.
How do you plant gladiolus corms?
Gladiolus corms should be planted with the pointed end facing upwards. The depth of planting varies depending on corm size, but generally, they should be planted 4-6 inches deep and spaced 4-6 inches apart.
What is the best time to plant gladiolus?
The best time to plant gladiolus corms is after the last frost, when the soil is warm and the risk of frost is minimal. This allows the corms to establish strong roots and produce healthy blooms.
By thoughtfully selecting companion plants and following good gardening practices, you can ensure your gladiolus thrive and create a truly spectacular display in your garden. Remember to consider the specific needs of your chosen gladiolus varieties and adjust your planting accordingly.
