Getting it to bloom

Why won't my Pink Pampas Grass bloom? (and how to make it flower)

Also called pink pampas grass, rosea pampas grass (Cortaderia selloana 'Rosea').

More about pink pampas grass

About Pink Pampas Grass

Cortaderia selloana 'Rosea' · also called pink pampas grass, rosea pampas grass · flowering

A pampas grass bearing soft rose-pink to pinkish-silver plumes that rise above arching green foliage in late summer, mellowing to creamy buff as they age. The pink flush is strongest in cool, bright autumn weather. Vigorous and drought-tolerant once established, it offers a warm-toned alternative to the usual white pampas for spacious sunny borders.

Plant type: flowering

The reasons pink pampas grass isn't blooming

Almost every non-blooming pink pampas 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 pink pampas 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 pink pampas grass to flower

Maximise sun. Give pink pampas 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 pink pampas grass and get the feeding right with the pink pampas 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

Pink Pampas 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 pink pampas grass care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Pink Pampas Grass blooming — frequently asked questions

Why won't my pink pampas grass flower?

Pink Pampas 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 pink pampas grass bloom?

Give pink pampas 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 pink pampas grass normally bloom?