Joe Swift, presenter of Gardeners’ World, shared his top tips for pruning lilacs and highlighted nine of the “finest” varieties for gardens this season
Gardening expert Joe Swift has revealed a straightforward technique to ensure your lilacs bloom beautifully again next year. A lilac is a flowering shrub, or occasionally a small tree, celebrated for its fragrant purple, pink, white, or blue blossoms that typically appear during spring.
Drawing on his extensive gardening experience, the Gardeners’ World presenter named the plant as one of his personal favourites.
“There is something rather wonderful about capturing a plant in all its brief glory, a precious week or two before it’s over for another year,” he shared.
“This is how I feel about lilacs, which tend to flower for about two to three weeks, although their backdrop-forming heart-shaped foliage is certainly an asset in the summer and autumn months.”
Offering his pruning guidance, he wrote in The Times Weekend Magazine: “Once your lilac gets to about 6ft tall, prune it lightly every year after flowering to develop a nicely balanced framework of stems.
“Thin it out a little by taking off any weak twiggy growth, non-productive and rubbing stems and any suckers from the base. Cut long (what you think is too long, that is) and thin stems back to a pair of leaves so that you are left with branches about the thickness of a pencil, and it should flower nicely the next year.”
He further pointed out that lilacs “cope well” with extreme temperatures, thrive in most soil types, with the exception of highly acidic ones, and can tolerate pollution with ease.
Detailing the “nine fine lilacs”, he identified:
- Syringa vulgaris ‘Andenken an Ludwig Späth’
- ‘Bellicent’ (Syringa × josiflexa)
- ‘Charles Joly’ (Syringa vulgaris)
- ‘Madame Lemoine’ (Syringa vulgaris)
- ‘Firmament’ (Syringa vulgaris)
- Syringa microphylla subsp. pubescens ‘Superba’
- ‘Red Pixie’ (Syringa hybrid group)
- Syringa meyeri ‘Palibin’ (Korean lilac)
- Syringa meyeri Flowerfesta Series (White, Pink, Purple)
Should any of your lilacs be aged, misshapen, excessively large, overly dense, or struggling to flower properly, Joe suggested it might require some “significant pruning”.
In these situations, he recommends cutting the plant down to within 15-20cm (6-8in) of ground level during spring, although earlier in the season is better.
“Yes, you’ll lose flowers that year. This severe pruning will throw up many shoots. At roughly the same time next year, select and retain several strong, healthy shoots to form the new framework, prune back to pencil thickness and remove all the others at ground level,” he added.
Joe’s guidance follows Alan Titchmarsh revealing his five essential gardening tasks to tackle before April ends.
According to him, the present moment is ideal for addressing the lawn, especially as it may have been impacted by moss following winter.
He also suggests pricking out young seedlings, sowing seeds in the vegetable patch, planting hardy perennials, and introducing cherry trees to the garden.

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