Planting & Care Guides


Planting & Care

  • Perennial
  • Full sun
  • Blooms early to late fall
  • Cold hardy to zone 5
  • Plant spacing: 12–16 inches

To produce a bushy plant with more blooms, pinch all growing tips up until July 4. Do not pinch after this date. Blooms may coincide with an early frost, so providing frost protection is important. When freezing night temperatures are predicted, a thin sheet suspended over the plants (don’t let it touch the buds/blooms) will allow you to continue to enjoy flowers until Thanksgiving. 


Planting & Care

  • Full sun
  • Blooms summer to first frost
  • Not cold hardy; lift tubers in late fall
  • Plant spacing: 12 inches

Choose a location with good drainage and full sun. After the last frost, dig holes 3–6 inches deep, lay tubers on their sides, and cover them with 1–2 inches of soil, allowing for 12-inch spacing between plants. Do not water at all until you see sprouts above the surface of the soil. After this point, water well 3–4 times a week. (In extreme heat, water more frequently.) When the dahlias are 8–10 inches tall, pinch to promote branching. Staking your dahlias using a simple corral system with twine and T-posts will keep them from toppling on windy days or during heavy rainfall. Fertilize regularly with a balanced fertilizer that has low nitrogen content. Neptune’s Harvest Tomato & Veg is especially effective. Cut blooms frequently to keep your plant producing all season long. 

Fall & winter care/storage

After the first heavy frost, carefully lift your tubers out of the ground (a pitchfork works well). You can shake off excess dirt and store whole clumps in bags or containers with pine shavings. Ideal storage conditions are 40–50 degrees with 80% humidity. A cool basement or garage works well, but make sure your tubers aren’t exposed to freezing temperatures. Check monthly for signs of rot and discard problem tubers. In February or early March rinse your clumps. Then divide them by looking for eyes (like the nubs on potatoes that will grow into sprouts) where the neck attaches to the clump. Using clean, sharp pruning shears, carefully cut tubers off the main stem, making sure they have at least one eye attached (see picture). Now you have more to plant!


Planting & Care

  • Perennial
  • Full sun
  • Blooms spring
  • Winter hardy in zones 8–10
  • Plant spacing: 6 inches

Plant in pots or ground with full sun. Fertilize weekly and cut spent blooms (at the base of the plant) to stimulate more buds. Ranunculus thrive in the cool spring. Once the weather heats up they will start to yellow and stop producing. Leave the corms in the ground (or pot) and let the foliage dry up, then lift the corms for storage. Cut off all foliage and leave dirt on the corms (it protects them from rot/excessive drying). Store in an open container in a dark, dry place (a garage or shed works nicely). Replant in November to enjoy your blooms another year!


314 W Blackburn Rd
Mount Vernon, WA 98273



All flowers pictured on this site were grown at Blackburn Gardens.