Getting it to bloom

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

Also called White Fir, Colorado White Fir, Concolor Fir (Abies concolor).

More about white fir

About White Fir

Abies concolor · also called White Fir, Colorado White Fir · flowering

White Fir is the most adaptable and drought-tolerant of the North American firs, with striking silver-blue to grey-green foliage. Tolerating a wider range of soils and climates than most Abies, it excels as a landscape conifer and Christmas tree in the western and central US. Its long, flat, upward-curving needles give it a soft, textured appearance.

Plant type: flowering

Watch for — Cooley spruce gall adelgid: Causes needle distortion and honeydew deposits on new growth in spring; horticultural oil applied before bud break in early spring disrupts the lifecycle and reduces populations effectively.

The reasons white fir isn't blooming

Almost every non-blooming white 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 white 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 white fir to flower

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

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

White Fir blooming — frequently asked questions

Why won't my white fir flower?

White 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 white fir bloom?

Give white 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 white fir normally bloom?