Getting it to bloom

Why won't my Hoop Pine bloom? (and how to make it flower)

Also called hoop pine, colonial pine, Moreton Bay pine (Araucaria cunninghamii).

More about hoop pine

About Hoop Pine

Araucaria cunninghamii · also called hoop pine, colonial pine · flowering

Araucaria cunninghamii, the hoop pine, is a tall Australian rainforest conifer named for the horizontal bark rings ringing its trunk. It carries dark, scale-like needles in tufts at branch tips and a distinctive domed crown. A slow-growing landscape and timber tree in warm climates, young plants make handsome, symmetrical indoor or patio specimens like its Norfolk relative.

Plant type: flowering

The reasons hoop pine isn't blooming

Almost every non-blooming hoop pine 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 hoop pine 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 hoop pine to flower

Maximise sun. Give hoop pine 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 hoop pine and get the feeding right with the hoop pine 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

Hoop Pine 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 hoop pine care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Hoop Pine blooming — frequently asked questions

Why won't my hoop pine flower?

Hoop Pine 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 hoop pine bloom?

Give hoop pine 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 hoop pine normally bloom?