Getting it to bloom
Why won't my Canadian Lousewort bloom? (and how to make it flower)
Also called Canadian lousewort, Wood betony, Forest lousewort, Lousewort (Pedicularis canadensis).
More about canadian lousewort
About Canadian Lousewort
Pedicularis canadensis · also called Canadian lousewort, Wood betony · flowering
Pedicularis canadensis is a spring-blooming hemiparasitic perennial native to open woodlands, prairie edges, and mesic forests from Quebec and Manitoba south through the eastern US to Texas and Florida. Its finely divided, fernlike foliage and tight spikes of hooded yellow to reddish-purple flowers emerge from April through June; it taps the roots of surrounding grasses and forbs for supplemental water and minerals while still photosynthesising its own sugars. Because it is a hemiparasite, it must be grown alongside suitable host plants — native bunchgrasses and prairie forbs are ideal — and it resents transplanting once established. It contains alkaloids and phenylpropanoid glycosides and is classified as mildly toxic to pets.
Plant type: flowering
Watch for — Failure to thrive without a host: Plants grown in sterile, isolated soil without neighbouring grasses or forbs for root attachment are short-lived and produce little flower. Establish a community planting with native bunchgrasses, little bluestem, or prairie sedges before or alongside sowing seed.
The reasons canadian lousewort isn't blooming
Almost every non-blooming canadian lousewort 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 canadian lousewort 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 canadian lousewort to flower
- Maximise sun. Give canadian lousewort 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 canadian lousewort and get the feeding right with the canadian lousewort 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
Canadian Lousewort 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 canadian lousewort care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.
Canadian Lousewort blooming — frequently asked questions
Why won't my canadian lousewort flower?
Canadian Lousewort 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 canadian lousewort bloom?
Give canadian lousewort 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 canadian lousewort normally bloom?
Canadian Lousewort 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 canadian lousewort 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 canadian lousewort flowering?
Feeding canadian lousewort a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.
Keep reading
- Canadian Lousewort care — the full brief (light, water, humidity, problems, pet safety)
- Canadian Lousewort light needs — usually the first thing to fix for flowers
- Canadian Lousewort 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