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Ranunculus flowers exude a romantic and ethereal vibe with their delicate, papery petals stacked in layers atop long stems amidst ruffled foliage. Although commonly mistaken for spring bulbs like tulips, ranunculus actually grow from corms, a modified stem base. Daniel Schavey, flower farmer and Petal Pickers Flower Company owner, notes the various ranunculus types and corm sizes, emphasizing the beauty they all possess.
Ranunculus thrive in mild winters and cool springs but decline rapidly in hot weather. These exquisite flowers not only add early-season charm to gardens but also attract pollinators and hummingbirds. Moreover, they are ideal as cut flowers lasting over ten days in vases.
In USDA zones 8 to 10, plant corms from late September to early January for a March bloom. The colder the climate, the slower the growth. Ideally, corms need 90 days from planting to blooming. In colder areas, corms should be pre-sprouted indoors in spring for an early start. Ranunculus are treated as annuals and require replanting each year for consistent blossoms.
**Caring for Ranunculus**
**Ranunculus Basics**
– Common Name: Ranunculus, Persian Buttercup
– Botanical Name: Ranunculus
– Family: Ranunculaceae
– Sun Exposure: Part to Full Sun
– Soil Type: Well-Draining, Slightly Acidic
– Mature Size: 2 inches to 2 feet tall, 3 to 6 inches wide
– USDA Hardiness Zones: 7 to 10 (annuals elsewhere)
– Native Area: US, Eurasia
– Toxic to Pets: Yes
**Planting Ranunculus**
*In Warm Climates:*
– Amend soil with compost if heavy clay
– Soak corms in cool water before planting
– Plant in part to full sun, 1-2 inches deep and 6-8 inches apart
– Cover with frost cloth in freezes below 25°F (z. 7-8)
*In Cold Climates:*
– Grow in containers and pre-sprout corms
– Plant tentacle-side down in well-draining mix
– Water only when soil is dry
– Allow sprouting in a cool, dark place
*Image credits: SondraP – Getty Images, Abby Lanes – Getty Images, Barbara Rich – Getty Images*
To grow ranunculus successfully, ensure temperatures are between 45 to 55 degrees. Once they sprout in 10 to 14 days, transfer them to larger terra cotta pots and place them under grow lights until ready to move the planters outdoors, typically 4 to 6 weeks before the last expected frost date in your region. Provide full sun for optimal growth.
Ranunculus thrive in part to full sun conditions but may benefit from afternoon shade in warm climates. Ensure well-draining soil to prevent rotting, especially in areas prone to soggy conditions.
Water the ranunculus well at planting and only water again when the soil is bone-dry. In outdoor settings, rely on winter rains for watering needs. Fertilization is unnecessary for ranunculus grown as annuals.
Common problems include aphids and powdery mildew, which can be managed by gentle hosing or ensuring proper air circulation. When cutting ranunculus for indoor display, harvest in the early morning of the second day when the blooms are lush. Change the water every few days for a longer vase life.
Note that ranunculus are toxic to pets, causing various symptoms if ingested. If ingestion occurs, seek immediate veterinary attention. Additionally, some individuals may experience skin irritation from the sap, so wear gloves when handling these flowers.
