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Talk about generosity . . . few blooms pack in as many petals as ranunculus. Fully double, with silky, almost translucent petals, these flowers are gorgeous florist favorites for obvious reasons. Now you can grow you own and enjoy a spring filled with made-for-cutting blooms.
Temperature is a consideration for successful ranunculus. These flowers prefer long cool springs, like the kind found in coastal CA. Ranunculus are unhappy in high temperatures and in the humidity of the South. These plants also grow well in cool greenhouses.
Choose a site with full sun. Ranunculus appreciate good light and develop weak stems when grown in shade.
Look for a site where the soil drains well. Ranunculus grow well in average garden soil, and as with most bulbs, good drainage is important to help avoid bulb rot. Note: we do not recommend amending the soil with bone meal as it encourages pets and pests to dig up the bulbs you just planted.
Ranunculus can be planted in the fall in areas where the ground doesn’t freeze (zones 8-11) and in the spring in any suitable region. Fall planting offers the advantage of blooms a few weeks earlier than bulbs are planted in the spring because the fall bulbs have settled in, grown roots and are ready to sprout sooner. Spring planted ranunculus can be planted after danger of frost has passed.
Start by soaking your bulbs overnight to soften the tough outer skins. Just put a little room temperature water in a bowl and add the bulbs.
Loosen the soil to 4” deep and add a handful or two of compost to the soil you removed. Place a bit of the amended soil back into the holes and plant your ranunculus bulbs about 2” below the soil line. These funny looking bulbs resemble a bunch of bananas. Plant with the points facing downwards. Refill the hole with soil, pat to eliminate air pockets and water well to settle the soil around the bulb.
For spacing, place the bulbs 4 to 5 inches apart.
Ranunculus plants need about 1” of water a week from rain, irrigation or a combination of the two.
After flowering, your ranunculus foliage will photosynthesize and create food for next year’s show. Don’t snip it off; let it do its work. As spring transitions into summer, the bulbs will go dormant and the foliage will yellow. At this point, feel free to remove the spent leaves. Ranunculus don’t need, nor benefit from, any extra moisture during the summer. In the fall, as soil temperatures cool, the bulbs will develop new roots, and wait for spring rains and warmth to prompt the next cycle of growth and blooms.
Light: Full sun outdoors
Soil: Average soil
Depth: Plant 2-3” deep, pointy ends facing down
Water: Average moisture
Uses: Garden beds and cutting gardens
Tip: Ranunculus need cool spring weather, without frosts, to flower well
They Start Out looking Like This:
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