Plant of the month: Magnolia

Garden Designer Lucy Willcox

Written by: Ashley Edwards

Magnolias are from an ancient line of plants that can be found in the fossil record. They were among the first plants to evolve flowers, before bees had evolved, relying on beetles for pollination. They make excellent trees for smaller gardens, many species can be grown in containers where they grow slowly to form medium size shrubs.

Early spring colour with magnolias

Spring is the time for magnolias to shine. The furry buds open on bare branches, before leaves emerge, and come in a range of colours from white to claret. The flowers vary in shape and size. M. stellata, as the name suggests, has star-shaped flowers that flutter delicately in the wind, whilst M. x soulangeana has goblet-shaped blooms that open up in warm weather. Magnolias give you a burst of colour when not much else is in flower, and once they’ve finished flowering, they have attractive leaves and usually form neat canopies or multi-stemmed shrubs.

Choosing the right spot

Magnolias like a sunny site, but can also be grown in dappled shade. A sheltered position is ideal (we have them growing against a south-facing wall at Dorney Court) as the flowers open early in the season, they can be susceptible to damage by late frosts, causing blooms to brown or drop. Wind can also strip trees of their petals and cause branches laden with flowers to snap. Avoid frost pockets and exposed sites.

Magnolias like well-drained soils, on the slightly acidic to neutral pH side, and will benefit from organic matter being added each year as a mulch. Avoid chalky soils or areas that become waterlogged over winter. If you choose to plant a magnolia in a pot, refresh the top layer of soil each year and consider adding a few centimetres of composted bark or leaf mould. Feeding your container plant with an organic liquid fertiliser will also encourage healthy leaves and buds.

Given the right conditions, magnolias will reward you with bright blossoms at a time when the rest of the garden is only just starting to wake up.

Discover our beauty

Explore our walled garden

The ancient walled garden remains an inspiring space with ivy-clad walls and terracotta brickwork surrounding plots of vegetables, manicured lawns and beautiful topiary. Records suggest that the walled garden was where the first pineapple to be grown in England was cultivated during the mid-seventeenth century!

Visit Crocus at Dorney

Discover our beauty

Explore our walled garden

The ancient walled garden remains an inspiring space with ivy-clad walls and terracotta brickwork surrounding plots of vegetables, manicured lawns and beautiful topiary. Records suggest that the walled garden was where the first pineapple to be grown in England was cultivated during the mid-seventeenth century!

Visit Crocus at Dorney

Planting your magnolia

The best time to plant your magnolia is in autumn or spring. Make sure the stem of the plant is planted at ground level, if it is planted too deep it will rot, or send out lots of suckers. Dig a hole slightly larger than the rootball, tease the roots out if necessary and add backfill to the planting hole with the soil you took out. If you have poor soil, you can incorporate garden compost when planting or as a mulch afterwards.

If you’re planting your magnolia in a container, choose something that will give it room to grow. For a young plant (3-5 litre pot) you probably want a pot that’s around 30-40cm in diameter. Any bigger and you’ll swamp it and the roots may die off, any smaller and it’ll dry out quickly and may not flower as profusely.

For larger plants (6l litre plus) you could go for a pot closer to 50-60cm in diameter. This will be a good permanent home for your magnolia, and the soil can be refreshed each year to keep it happy. Choose M. stellata and cultivars like ‘Centennial’ as they grow slower, there are also compact cultivated varieties such as Magnolia liliiflora ‘Nigra’ and Magnolia 'Genie' which work well in pots. Make sure your pot has drainage holes and put it on pot feet in the winter to prevent water sitting at the bottom, magnolias hate saturated soil.

Pruning

Magnolia need minimal pruning as they usually grow into graceful layered shrubs or small trees. If needed, you can prune out any dead or damaged stems after flowering. Magnolia grandiflora is evergreen and summer-flowering, so may need pruning to thin out the canopy, crown lift or shape if a formal look is desired.

Make a statement with magnolia

Magnolia is a great choice if you want a statement plant for the spring border, courtyard, lawn, or as a feature in a pot. If you plant near a door or window, you’ll be able to see the graceful blooms and get the most out of their short flowering period. It’s this short, spectacular display that makes magnolias so desirable. It stops you in your tracks and reminds us to slow down and appreciate the extraordinary changes that come with spring.

Magnolias

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Magnolias

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