Getting it to bloom

Why won't my Manna Ash bloom? (and how to make it flower)

Also called Manna Ash, Flowering Ash, South European Flowering Ash (Fraxinus ornus).

More about manna ash

About Manna Ash

Fraxinus ornus · also called Manna Ash, Flowering Ash · flowering

Manna Ash is a small to medium deciduous tree native to southern Europe and Asia Minor, prized for its spectacular display of fragrant, creamy-white flowers in late spring — unlike most ashes, which have wind-pollinated, petal-less flowers. The sweet sap (manna) has historical medicinal use. Excellent ornamental tree for smaller gardens and urban streets.

Plant type: flowering

Watch for — Poor flowering in shade: Unlike other ash species, F. ornus relies on insect pollination and produces conspicuous flowers — but these fail or are sparse if the tree is sited in shade. Ensure an open, sunny position is chosen at planting, as remedying this later is difficult.

The reasons manna ash isn't blooming

Almost every non-blooming manna ash 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 manna ash 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 manna ash to flower

Maximise sun. Give manna ash 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 manna ash and get the feeding right with the manna ash 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

Manna Ash 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 manna ash care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Manna Ash blooming — frequently asked questions

Why won't my manna ash flower?

Manna Ash 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 manna ash bloom?

Give manna ash 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 manna ash normally bloom?