Getting it to bloom

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

Also called Water Speedwell, Blue Water Speedwell (Veronica anagallis-aquatica).

More about water speedwell

About Water Speedwell

Veronica anagallis-aquatica · also called Water Speedwell, Blue Water Speedwell · flowering

Water Speedwell is a native European aquatic or semi-aquatic perennial producing slender racemes of tiny pale blue to lilac flowers along stream banks, pond margins, and wet ditches throughout summer. A good habitat plant for wildlife ponds, it provides nectar for small bees and hoverflies. Fast-growing and naturally self-seeding.

Plant type: flowering

Watch for — Self-seeding becoming weedy: Water Speedwell self-seeds prolifically and can colonise beyond its intended planting area. Deadhead spent flower racemes before seed sets if spread needs to be controlled in a managed pond or garden.

The reasons water speedwell isn't blooming

Almost every non-blooming water speedwell 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 water speedwell 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 water speedwell to flower

Maximise sun. Give water speedwell 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 water speedwell and get the feeding right with the water speedwell 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

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

Water Speedwell blooming — frequently asked questions

Why won't my water speedwell flower?

Water Speedwell 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 water speedwell bloom?

Give water speedwell 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 water speedwell normally bloom?