Hydrangeas are perennial flowering shrubs, and limelight is a varietal of panicle hydrangea that produces pale pistachio green flower heads. It blooms in the summer through the late summer and fall. As the flowers age, they will gradually change color, becoming a deep pink. Limelight hydrangeas reach up to 8 feet in height at maturity and are hardy in USDA zones 3 through 9.
Select a planting location for your limelight hydrangea that affords a full sun to partial daily shade exposure. In warmer, southern climates where the afternoon sun is very hot, a planting location with afternoon shade will boost the plant's performance.
Prepare a planting soil that is nutrient rich and well drained. Amend the soil with compost and or well aged manure mixing them into the soil evenly. Add a small dose of granular acid-rich fertilizer, such as MirAcid, mixed into the planting soil to feed the hydrangea as it establishes itself.
Dig a hole at least twice the diameter of the hydrangea's root ball and at least 6 inches deeper. Till up the soil in the bottom of the hole to make it easy for the new tender roots to penetrate into the soil.
Place your limelight hydrangea down in the prepared hole, keeping the soil level in the same spot on the main trunk. Back-fill the amended soil around the root ball and tamp down the soil to secure the plant and collapse any air pockets.
Water in deeply around the base of the plant allowing the applied water to percolate down into the soil before watering in a second time. Keep the soil evenly moist throughout the year never allowing it to dry out.
Mulch around the base of the hydrangea with shredded bark, compost or cocoa bean hulls to hold moisture in the soil and keep weeds from colonizing.