Common Name Geum, Avens
Genus  Geum 
Species hybrid
Family Rosaceae
Life Cycle  Perennial 
Tray Size  32
Plug Care Harden off and plant out or bump up into larger pots soon after receiving plugs. When planting out be sure you to not bury the crowns. Plant the plugs so that the top of the growing medium is level with the soil.
Netting / Staking Not necessary. 
Temperature Range Hardiness Zones 5-9 (May be hardy in zones 3 and 4)
Spacing 12-16"
Soil Preference Moist, loamy soil with average water needs. Let soil dry back moderately between waterings. 
Day Length Day-neutral plants. Plant in full sun to partial shade. 
Pinching Do not pinch. 
When to Plant Plant in the spring after the threat of frost has passed. Plugs can be planted later in the season as well, through to the end of summer.
Harvesting Harvest flowers when they are half open for longest vase life. Keep flowers cut or deadheaded to prolong the flowering period of the plant.
Post Harvest Care Cut stems should immediately be placed into cool water. Expect a vase life of approximately a week. Use a floral preservative to maximize vase life.
Diseases / Insects Plants can be affected by aphids and whiteflies. Resistant to most diseases but botrytis and mildews are possible in areas with poor air movement or in periods of extended dampness. 
Bailey's Notes There's nothing like a few stems of Geum in a spring bouquet to add a touch of movement and whimsy. 
Resources Growing Geum