Getting it to bloom

Why won't my Silver Fir bloom? (and how to make it flower)

Also called Silver Fir, European Silver Fir, Common Silver Fir (Abies alba).

More about silver fir

About Silver Fir

Abies alba · also called Silver Fir, European Silver Fir · flowering

Silver Fir is a majestic European conifer reaching 40–50 m in native forests. It thrives in cool, moist, mountainous climates with well-drained, slightly acidic soils. Best planted in full sun to partial shade, it demands consistent moisture and good air circulation. Unsuitable as a houseplant; grown as a landscape specimen or Christmas tree in suitable climates.

Plant type: flowering

Watch for — Woolly adelgid (Adelges nordmannianae): White woolly deposits on young shoots and needles indicate woolly adelgid infestation; treat with horticultural oil or insecticidal soap in early spring before bud break.

The reasons silver fir isn't blooming

Almost every non-blooming silver fir 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 silver fir 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 silver fir to flower

Maximise sun. Give silver fir 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 silver fir and get the feeding right with the silver fir 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

Silver Fir 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 silver fir care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Silver Fir blooming — frequently asked questions

Why won't my silver fir flower?

Silver Fir 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 silver fir bloom?

Give silver fir 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 silver fir normally bloom?