Getting it to bloom
Why won't my Ithuriel's Spear bloom? (and how to make it flower)
Also called Ithuriel's spear, Grassnut, Triplet lily, Wild hyacinth (Triteleia laxa).
More about ithuriel's spear
About Ithuriel's Spear
Triteleia laxa · also called Ithuriel's spear, Grassnut · flowering
Triteleia laxa is a cormous perennial native to grasslands and open woodlands of California and southern Oregon, producing open umbels of funnel-shaped, pale to deep violet-blue flowers on tall, wiry stems in late spring and early summer as the grass-like leaves die back. It is a tough, drought-tolerant bulb that thrives in full sun to part shade in light, free-draining soil and is well suited to naturalising in gravel gardens, dry borders, and rock gardens. The corms need a dry summer dormancy and should not be overwatered. No formal ASPCA listing for toxicity has been found; treat with caution and classify as mildly-toxic.
Plant type: flowering
Watch for — Thrips: Western flower thrips (Frankliniella occidentalis) can damage the flowers, causing silvery streaking and distortion. Inspect plants regularly during flowering; remove heavily infested material and apply an appropriate insecticide if damage is severe.
The reasons ithuriel's spear isn't blooming
Almost every non-blooming ithuriel's spear 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 ithuriel's spear 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 ithuriel's spear to flower
- Maximise sun. Give ithuriel's spear 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 ithuriel's spear and get the feeding right with the ithuriel's spear 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
Ithuriel's Spear 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 ithuriel's spear care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.
Ithuriel's Spear blooming — frequently asked questions
Why won't my ithuriel's spear flower?
Ithuriel's Spear 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 ithuriel's spear bloom?
Give ithuriel's spear 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 ithuriel's spear normally bloom?
Ithuriel's Spear flowers across its growing season (mostly summer) and, kept fed and deadheaded, can bloom for many weeks or right up to frost.
What should I do with ithuriel's spear after it flowers?
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.
What is the single biggest mistake stopping ithuriel's spear flowering?
Feeding ithuriel's spear a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.
Keep reading
- Ithuriel's Spear care — the full brief (light, water, humidity, problems, pet safety)
- Ithuriel's Spear light needs — usually the first thing to fix for flowers
- Ithuriel's Spear fertilising — the right feed for buds, not just leaves
- Should I water my plant? The simple check
- Why is my plant wilting? Wet vs dry
- Underwatered plant — signs and rehydration
- Why won't my peace lily bloom?
- Why won't my jade plant bloom?
- Why won't my tomato bloom?
- All 4114 bloom guides in the Growli library