Getting it to bloom

Why won't my Showy Goldenrod bloom? (and how to make it flower)

Also called showy goldenrod, noble goldenrod (Solidago speciosa).

More about showy goldenrod

About Showy Goldenrod

Solidago speciosa · also called showy goldenrod, noble goldenrod · flowering

Showy goldenrod earns its name with dense, plume-like spires of bright golden flowers held upright on reddish stems in autumn. A clump-forming, non-aggressive native, it stays tidy in gardens while feeding late-season bees and butterflies. It thrives in full sun and lean, well-drained soil, making one of the most ornamental and border-friendly goldenrods.

Plant type: flowering

Watch for — Slow establishment from seed: Seedlings develop slowly and may not flower until the second or third year; division gives faster results.

The reasons showy goldenrod isn't blooming

Almost every non-blooming showy goldenrod 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 showy goldenrod 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 showy goldenrod to flower

Maximise sun. Give showy goldenrod 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 showy goldenrod and get the feeding right with the showy goldenrod 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

Showy Goldenrod 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 showy goldenrod care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Showy Goldenrod blooming — frequently asked questions

Why won't my showy goldenrod flower?

Showy Goldenrod 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 showy goldenrod bloom?

Give showy goldenrod 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 showy goldenrod normally bloom?