Getting it to bloom

Why won't my large blue fescue bloom? (and how to make it flower)

Also called large blue fescue, tufted fescue, hair fescue, amethyst fescue (Festuca amethystina).

More about large blue fescue

About large blue fescue

Festuca amethystina · also called large blue fescue, tufted fescue · flowering

Large blue fescue is an elegant, cool-season ornamental grass forming dense, evergreen tufts of fine, rolled blue-green to silver-blue foliage. In early summer it produces upright flowering spikes with a distinctive purple-amethyst flush. Hardy in zones 4–8, it excels in full sun with well-drained, lean soil and is more heat-tolerant than many fine-leaved fescues.

Plant type: flowering

The reasons large blue fescue isn't blooming

Almost every non-blooming large blue fescue 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 large blue fescue 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 large blue fescue to flower

Maximise sun. Give large blue fescue 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 large blue fescue and get the feeding right with the large blue fescue 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

large blue fescue 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 large blue fescue care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

large blue fescue blooming — frequently asked questions

Why won't my large blue fescue flower?

large blue fescue 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 large blue fescue bloom?

Give large blue fescue 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 large blue fescue normally bloom?