Our top tips for planting Ranunculus
Ranunculus, with their vibrant, layered blooms, are a florist’s dream! While they may seem a bit delicate, growing ranunculus is easier than you might think if you follow a few simple steps. Here are our top tips for planting these gorgeous flowers and setting yourself up for a stunning spring display.
1. Soak the Corms Overnight
Ranunculus grow from corms that resemble tiny, spider-like clusters. To prepare them for planting, soak the corms overnight in a bowl of water. This step plumps them up and “wakes” them from dormancy, getting them ready to sprout. By morning, the corms will have softened and expanded, primed for planting.
Ranunculus corms soaking over night.
2. Pre-Sprout for a Head Start
The next day, take the soaked corms and place them on a tray filled with compost. Cover them lightly with a thin layer of compost and give them a gentle watering. This pre-sprouting stage helps your ranunculus corms develop roots and sprout before they are planted in the ground.
We recommend pre-sprouting in a warm, sheltered area, such as a greenhouse. However, any location that provides consistent warmth and protection from frost will do.
Ranunculus Sprouting Stage.
3. Transplant Once Sprouted
When the corms have sprouted and started showing small green leaves, they’re ready to be planted. Transplant them into the ground, spacing them about 15cm (6 inches) apart. This gives them enough room to grow without overcrowding.
If you have access to a polytunnel, we recommend planting your ranunculus there. A polytunnel provides a more controlled environment, leading to better stem length and healthier flowers. While it’s possible to grow ranunculus outdoors, their stems may not grow as tall as those grown in a protected environment.
Additional Tips for Success
• Choose the Right Soil: Ranunculus thrive in well-drained, nutrient-rich soil. Consider adding organic matter like compost to improve drainage and fertility.
• Timing Matters: Sprout your corms in late Autumn or early spring, but if planting outside only do so once the risk of frost has passed or in a sheltered area like a polytunnel.
• Water Wisely: Avoid overwatering during the pre-sprouting stage and after planting, as ranunculus corms are prone to rotting in overly wet conditions.
Ranunculus in bud, ready to pick.
Ranunculus are ready to pick when the colour is clearly visible and the flower is just starting to open. Give the head a gentle squeeze, if it feels like a marshmallow then its ready.
Make sure you cut them right at the bottom of the stem as this encourages new blooms to grow.
Vase life is 10 to 12 days when picked at this stage.
By following these steps, you’ll be rewarded with an abundance of ranunculus blooms that will bring beauty to your garden and make you smile.. Happy planting!
Ranunculus