Growing ranunculus in coastal British Columbia is easier than most gardeners expect. They want cool weather, sharp drainage and full sun, which is more or less what a Fraser Valley spring provides — the trouble is usually too much kindness rather than too little.
We grow them in the field at our Abbotsford farm and lift the corms each summer, so this guide is the version we follow rather than the one from a catalogue written for a drier climate.
Growing Ranunculus: When and Where
Plant in early spring once the ground is workable, or in autumn in a sheltered spot for earlier blooms. In coastal BC autumn planting works well, but a hard frost will knock the plants back and waterlogged soil will rot the corms outright. If your ground holds water in winter, wait for spring.
Full sun, six hours minimum, and soil that drains within an hour of heavy rain. Raised beds are the simplest answer if your soil is heavy.
Planting Corms the Right Way
Ranunculus corms look like small claws, and the claw points down. Plant them 5cm deep and 20 to 25cm apart, soaked for a few hours beforehand to wake them up. Do not bury them deeper to “be safe” — deep planting is the most common reason growing ranunculus fails.
Watering, Feeding and Support
Growing ranunculus in a raised bed makes all of this easier, because you control the drainage rather than arguing with it. Water in the morning so foliage dries before evening, which is the difference between healthy plants and a spring of powdery mildew. Feed lightly at planting and again when buds appear; too much nitrogen grows leaves instead of flowers.
Tall varieties benefit from a low grid of netting strung about 30cm above the ground. Ranunculus stems are surprisingly brittle in wind.
Can You Grow Ranunculus in Pots?
Yes, and it is a good way to start. Use a pot at least 30cm deep, a free-draining mix and the same spacing you would use in the ground. Growing ranunculus in containers works best if you treat the pot like a field bed: full sun, damp but never wet, and a low ring of netting once the stems get tall.
Harvesting Stems for the House
If you are growing ranunculus for the house rather than for showing, cut more often, not less. Cut when the bud shows colour and is still tight — a fully open ranunculus will not last in a vase. Cut in the morning, strip the lower leaves, and get the stems into cool water straight away. Expect each plant to give several stems over a long season if you keep cutting.
Want to skip the growing? We lift extra corms each season and share them from the farm, or you can buy the flowers already cut.
Lifting and Storing Corms
Let the foliage die back naturally after flowering, then lift the corms and dry them somewhere airy and out of the sun for a week. Store them in a paper bag, not plastic, somewhere cool and dry. Never seal damp corms in a bag: the only thing that reliably kills ranunculus is rot, and a sealed bag guarantees it.
Buying Corms in the Fraser Valley
We lift more corms than we replant and share the extras each autumn — unlabelled, so the colours are a lucky dip, which is half the fun. They are available for farm pickup only at our ranunculus corms. If you would rather skip the growing and just enjoy the flowers, they appear at the flower stand in Abbotsford and at the Abbotsford farmers market from late spring, and a flower subscription in Abbotsford brings them to your door through the season. Questions about growing ranunculus? Message us — we are happy to talk soil, and you can find the farm here.
