Getting it to bloom

Why won't my Overdam Variegated Feather Reed Grass bloom? (and how to make it flower)

Also called overdam feather reed grass, variegated feather reed grass (Calamagrostis x acutiflora 'Overdam').

More about overdam variegated feather reed grass

About Overdam Variegated Feather Reed Grass

Calamagrostis x acutiflora 'Overdam' · also called overdam feather reed grass, variegated feather reed grass · flowering

Overdam is the variegated form of feather reed grass, its upright blades edged in creamy white that often flushes pink in cool spring weather. It forms a slightly shorter, brighter column than Karl Foerster, topped by feathery flower spikes that dry to tan. Sterile and hardy, it brings vertical structure and luminous foliage to borders.

Plant type: flowering

The reasons overdam variegated feather reed grass isn't blooming

Almost every non-blooming overdam variegated feather reed grass 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 overdam variegated feather reed grass 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 overdam variegated feather reed grass to flower

Maximise sun. Give overdam variegated feather reed grass 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 overdam variegated feather reed grass and get the feeding right with the overdam variegated feather reed grass 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

Overdam Variegated Feather Reed Grass 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 overdam variegated feather reed grass care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Overdam Variegated Feather Reed Grass blooming — frequently asked questions

Why won't my overdam variegated feather reed grass flower?

Overdam Variegated Feather Reed Grass 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 overdam variegated feather reed grass bloom?

Give overdam variegated feather reed grass 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 overdam variegated feather reed grass normally bloom?