Getting it to bloom

Why won't my Greater Woodrush bloom? (and how to make it flower)

Also called Greater woodrush, Wood rush, Great woodrush (Luzula sylvatica).

More about greater woodrush

About Greater Woodrush

Luzula sylvatica · also called Greater woodrush, Wood rush · flowering

Luzula sylvatica is a vigorous, clump-forming evergreen sedge-like plant native to woodland margins and shaded hillsides across Europe and western Asia. It thrives in deep shade and moist, humus-rich soil, making it one of the best ground-cover plants for difficult shady spots under trees. The most important care fact is that it tolerates heavy shade and dry shade once established better than almost any other grass-like plant. Not listed as toxic by the ASPCA; considered pet-safe.

Plant type: flowering

The reasons greater woodrush isn't blooming

Almost every non-blooming greater woodrush 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 greater woodrush 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 greater woodrush to flower

Maximise sun. Give greater woodrush 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 greater woodrush and get the feeding right with the greater woodrush 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

Greater Woodrush 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 greater woodrush care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Greater Woodrush blooming — frequently asked questions

Why won't my greater woodrush flower?

Greater Woodrush 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 greater woodrush bloom?

Give greater woodrush 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 greater woodrush normally bloom?