Getting it to bloom

Why won't my Lilac 'Charles Joly' bloom? (and how to make it flower)

Also called Charles Joly lilac (Syringa vulgaris 'Charles Joly').

More about lilac 'charles joly'

About Lilac 'Charles Joly'

Syringa vulgaris 'Charles Joly' · also called Charles Joly lilac · flowering

'Charles Joly' is a classic French double-flowered common lilac, carrying richly fragrant panicles of deep magenta-purple in late spring. An RHS Award of Garden Merit shrub, it shares the vigour and hardiness of the species, needing full sun and neutral-to-alkaline, well-drained soil. The double florets hold colour well and make it one of the most sought-after dark lilacs.

Plant type: flowering

Watch for — Sparse or colourless bloom: Too little sun, late or hard pruning, or excess nitrogen all cut flowering and dull the deep magenta. Prune immediately after flowering on the old wood.

The reasons lilac 'charles joly' isn't blooming

Almost every non-blooming lilac 'charles joly' traces back to one of these, roughly in order of how common they are:

Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.
Too much nitrogen feed, driving lush foliage at the expense of flowers (very common with general or lawn feeds).
The plant has not been deadheaded, so it stops flowering once it sets seed.
Irregular watering — drought or waterlogging at the budding stage makes buds abort.
It is still too young or was checked by a transplant and is rebuilding before flowering.

Feeding lilac 'charles joly' a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.

The fix — how to get lilac 'charles joly' to flower

Maximise sun. Give lilac 'charles joly' the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers.
Switch the feed. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.
Deadhead regularly. Remove spent flowers often to keep it producing more rather than stopping to set seed.
Water consistently. Keep moisture even through budding and flowering — drought-then-flood swings make buds drop.

Light and feeding do most of the heavy lifting here. Dial in the spot with the light guide for lilac 'charles joly' and get the feeding right with the lilac 'charles joly' fertilising schedule — the wrong feed (too much nitrogen) is one of the most common silent reasons a healthy plant makes leaves instead of flowers.

Bloom season and what to expect

Lilac 'Charles Joly' flowers across its growing season (mostly summer) and, kept fed and deadheaded, can bloom for many weeks or right up to frost.

Post-bloom care so it flowers again

Deadhead, keep feeding lightly, and many will rebloom; collect seed from the best plants at the end of the season if you want to grow them again.

For everything else this plant needs day to day, see the full lilac 'charles joly' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Lilac 'Charles Joly' blooming — frequently asked questions

Why won't my lilac 'charles joly' flower?

Lilac 'Charles Joly' blooms on the season's growth given enough sun, warmth and the right feed — there is no cold or photoperiod trick, just good growing conditions and a bloom-leaning feed. The most common reason it is not happening: Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.

How do I make lilac 'charles joly' bloom?

Give lilac 'charles joly' the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.

When does lilac 'charles joly' normally bloom?