Getting it to bloom

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

Also called Forking larkspur, Royal larkspur, Field larkspur (Consolida regalis).

More about forking larkspur

About Forking larkspur

Consolida regalis · also called Forking larkspur, Royal larkspur · flowering

Forking larkspur is a delicate, branching annual native to European meadows and arable land, producing airy sprays of small violet-blue or white spurred flowers with distinctive forked stems. Lighter and more open in habit than Consolida ajacis, it brings an effortless meadow aesthetic to borders and cut-flower arrangements. Thrives in cool weather and lean, well-drained soil.

Plant type: flowering

Watch for — Early termination in summer heat: Forking larkspur is even more heat-sensitive than Consolida ajacis. Plants yellow, set seed, and die quickly when temperatures rise above 20°C. Sow in autumn for spring bloom or as early in spring as possible to maximise the cool-season window.

The reasons forking larkspur isn't blooming

Almost every non-blooming forking larkspur 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 forking larkspur 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 forking larkspur to flower

Maximise sun. Give forking larkspur 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 forking larkspur and get the feeding right with the forking larkspur 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

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

Forking larkspur blooming — frequently asked questions

Why won't my forking larkspur flower?

Forking larkspur 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 forking larkspur bloom?

Give forking larkspur 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 forking larkspur normally bloom?