Getting it to bloom

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

Also called Goldenrod, European Goldenrod, Woundwort (Solidago virgaurea).

More about goldenrod

About Goldenrod

Solidago virgaurea · also called Goldenrod, European Goldenrod · flowering

Solidago virgaurea is a native British and European herbaceous perennial found in open woodland, grassland, heathland, and cliff-tops, valued for its late-summer sprays of golden-yellow flowers that are a vital nectar source for bees and butterflies. It thrives in poor, well-drained soils in full sun and requires minimal care once established. The most important maintenance task is removing spent stems before they set seed, as the plant can spread aggressively by both rhizomes and self-seeding. Solidago species are generally considered non-toxic to cats and dogs, though the genus is not formally listed by the ASPCA and a cautious mildly-toxic classification is applied.

Plant type: flowering

Watch for — Aggressive self-seeding and rhizome spread: The plant spreads freely by both underground rhizomes and abundant seed; deadhead promptly after flowering and divide clumps every 3–4 years to keep growth in check.

The reasons goldenrod isn't blooming

Almost every non-blooming 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 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 goldenrod to flower

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

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

Goldenrod blooming — frequently asked questions

Why won't my goldenrod flower?

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 goldenrod bloom?

Give 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 goldenrod normally bloom?