Getting it to bloom

Why won't my New Zealand Gentian bloom? (and how to make it flower)

Also called New Zealand gentian, rock gentian (Gentiana saxosa).

More about new zealand gentian

About New Zealand Gentian

Gentiana saxosa · also called New Zealand gentian, rock gentian · flowering

Gentiana saxosa (also treated as Gentianella saxosa by some taxonomists) is a low evergreen perennial endemic to coastal rock outcrops, sand dunes, and cliff-top turf of New Zealand's South Island and Stewart Island, where it blooms in summer with white, bell-shaped flowers veined purple-green. It is considered the most garden-worthy and easiest to grow of New Zealand's white gentians, though it remains a specialist plant requiring sharp drainage and cool but sunny conditions. The most critical care point is that it strongly dislikes humidity and winter wet — in the UK it is best suited to an alpine house or a well-ventilated cold frame. This species is not known to be toxic to cats and dogs.

Plant type: flowering

The reasons new zealand gentian isn't blooming

Almost every non-blooming new zealand gentian 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 new zealand gentian 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 new zealand gentian to flower

Maximise sun. Give new zealand gentian 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 new zealand gentian and get the feeding right with the new zealand gentian 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

New Zealand Gentian 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 new zealand gentian care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

New Zealand Gentian blooming — frequently asked questions

Why won't my new zealand gentian flower?

New Zealand Gentian 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 new zealand gentian bloom?

Give new zealand gentian 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 new zealand gentian normally bloom?