25% off Which? Gardening
Pay £36.75 for the first year and get the garden you want for less
Get this offerBy clicking a retailer link you consent to third party cookies that track your onward journey. If you make a purchase, Which? will receive an affiliate commission which supports our mission to be the UK's consumer champion.
Magnolias come in a wide variety of flower shapes and colours, as well as different tree sizes. They do best in a neutral to acidic soil, but if you have an alkaline soil, you can still enjoy the smaller varieties by growing them in a container filled with ericaceous compost.
The eventual size of a magnolia can vary, depending partly on location, but it generally takes around 10-20 years to reach maturity.
Breathe new life into your outside spaces. Sign up for our Gardening newsletter, it's free monthly
PLANT TYPE Hardy deciduous tree or large shrub
POSITION Sunny and sheltered
SOIL Neutral to acidic
January | February | March | April | May | June |
FLOWERING | FLOWERING | ||||
July | August | September | October | November | December |
PRUNE | PRUNE | PRUNE |
Height x spread: 6 x 6m max
Where to buy: Burncoose Nurseries; Ornamental Trees
This is one of the larger trees we looked at, and holder of an RHS Award of Garden Merit (AGM). The Savill Garden has a champion specimen that was a magnificent sight in full flower. Tall and stately, the branches arched downwards so the whole outline of the tree was completely festooned with spidery petalled white blooms. The fragrance was one of the strongest of the varieties we assessed, and the flowers were a magnet to bees.
Peak flowering: March-April
Height x spread: 6 x 5m max
Where to buy: Burncoose Nurseries; Bluebell Nursery
‘Pegasus’ can be quite upright in shape when young, but it spreads more as it matures. The tall flowers, often described as candle-shaped, are cool and elegant. They sit upright on short spurs at close intervals along the branches, either singly or in small groups. Deep pink streaks at the base of each bloom liven up the otherwise creamy-white colour of the tepals (petal-like structures that are neither petals nor sepals).
Peak flowering: March-April
Height x spread: 3.5 x 4m max
Where to buy: Thompson & Morgan; Bluebell Nursery
‘Royal Star’ holds an AGM, and although superficially similar to the species M. stellata, it’s potentially slightly bigger at full size. It also has larger, fuller and showier flowers with long, soft, white tepals that open from pink buds. It develops into a bushy, rounded, shrub-like tree with pompoms of blooms. The only thing it lacked was scent which, although pleasant, wasn’t very strong.
Peak flowering: March-April
Height x spread: 6 x 5m max
Where to buy: Crocus; Burncoose Nurseries
This AGM variety is a potentially tall and upright tree. The mature one we looked at had a domed shape and flower-covered branches that spread and reached down to the ground, while younger trees we saw were bushier and more shrub-like. The flowers smothered the branches, and their long, narrow, pink-blushed tepals curled into a variety of lovely shapes. They were scented and popular with insects.
Peak flowering: March-April
Variety name | Overall rating | Height x spread (m) | Impact of flowers | Coverage of flowers | Shape of tree | Overall display in full flower | Insect attraction | Scent | Health |
---|---|---|---|---|---|---|---|---|---|
Best Buy M. x loebneri 'Leonard Messel' | 6 x 5 | ||||||||
Best Buy M. x loebneri 'Merrill' | 6 x 6 | ||||||||
Best Buy 'Pegasus' | 6 x 5 | ||||||||
Best Buy M. stellata 'Royal Star' | 3.5 x 4 | ||||||||
Recommended 'David Clulow' | 6 x 6 | ||||||||
Recommended 'Margaret Helen' | 4 x 3 | ||||||||
Recommended M. stellata | 2.5 x 3 |
OVERALL RATING The more stars the better. Ignores price and is based on: flower impact 20%; flower coverage 20%; overall display 20%; tree shape 15%; insect attraction 10%; scent 10%; health 5% a Overall display takes into account the impact of individual flowers and their number, and coverage. n/a These magnolias were only seen at the beginning of their flowering period and not when they were in full flower over the tree canopy.
Which? members can log in now to see the full results and which are our Best Buy varieties. If you’re not a member, join Which? to get instant access.
Variety name | Overall rating | Height x spread (m) | Impact of flowers | Coverage of flowers | Shape of tree | Overall display in full flower | Insect attraction | Scent | Health |
---|---|---|---|---|---|---|---|---|---|
'David Clulow' | |||||||||
M. loebneri 'Leonard Messel' | |||||||||
M. loebneri 'Merrill' | |||||||||
'Margaret Helen' | |||||||||
'Pegasus' | |||||||||
'Pristine' | |||||||||
M. sprengeri 'Diva' |
OVERALL RATING The more stars the better. Ignores price and is based on: flower impact 20%; flower coverage 20%; overall display 20%; tree shape 15%; insect attraction 10%; scent 10%; health 5% a Overall display takes into account the impact of individual flowers and their number, and coverage. n/a These magnolias were only seen at the beginning of their flowering period and not when they were in full flower over the tree canopy.
Pay £36.75 for the first year and get the garden you want for less
Get this offerMost deciduous magnolias can be grown in neutral to acidic soil. Plant in a sheltered spot, protected from cold winds and frost. Position in full sun or light shade. Add plenty of soil improver when planting, and mulch well. If growing in a container, use an ericaceous compost and an ericaceous controlled-release feed.
Try a Best Buy compost bin
Water newly planted trees regularly for the first year while they establish. Water container-grown plants regularly.
Discover our Best Buy garden hoses
Mulch annually with 5cm of soil improver. In spring, you can add a balanced fertiliser, such as Growmore, if soil is poor. Give container-grown plants either liquid feed monthly in spring and summer or add controlled-release fertiliser each spring, with a top dressing of fresh ericaceous compost.
Light pruning to remove dead or damaged stems can be done annually if needed. To reduce tree size or renovate a tree, cut small numbers of branches back to a fork evenly around the tree, over several years. Prune mid-summer to early autumn
Making pruning easier with Best Buy secateurs
Scale insects on leaves can result in sooty mould and poor growth. Look for the round, flat insects around veins on the undersides of leaves, and treat heavy infestations with nematode, Steinernema feltiae
Read more about scale insects
Frost can damage buds and flowers. Don’t plant in exposed places, and consider protecting small trees with fleece when frost is forecast in spring.
Read more about protecting plants from frost
In March, we visited The Savill Garden and The Valley Gardens in Windsor Great Park, where a National Collection of magnolias is held. We had chosen around 25 varieties of a suitable size for planting in gardens for our assessment, all of which were available from at least one mail-order nursery.
We noted the impact of the individual blooms and the whole display, which flowers were scented, and which were attracting plenty of pollinating insects. We also noted the size and shape of the trees.