Getting it to bloom

Why won't my Mock Orange bloom? (and how to make it flower)

Also called mock orange, sweet mock orange (Philadelphus coronarius).

More about mock orange

About Mock Orange

Philadelphus coronarius · also called mock orange, sweet mock orange · flowering

Philadelphus coronarius is a robust deciduous shrub grown for clusters of single, creamy-white flowers in early summer with a powerful orange-blossom fragrance. Easy and tolerant, it suits mixed borders and informal hedging, flowering on the previous year's wood. Give it full sun to light shade on almost any well-drained soil.

Plant type: flowering

Watch for — Few flowers after wrong-time pruning: It blooms on last year's wood; pruning in winter or spring removes the flower buds. Prune immediately after flowering instead.

The reasons mock orange isn't blooming

Almost every non-blooming mock orange 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 mock orange 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 mock orange to flower

Maximise sun. Give mock orange 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 mock orange and get the feeding right with the mock orange 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

Mock Orange 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 mock orange care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Mock Orange blooming — frequently asked questions

Why won't my mock orange flower?

Mock Orange 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 mock orange bloom?

Give mock orange 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 mock orange normally bloom?