Rhododendron - Growing Guide

The Basics

Rhododendrons are most suited to a mild to temperate or cold climate. They offer spectacular spring flowers and are closely related to Azaleas. Following a few basics when planting your new shrubs will reward you with a beautiful spring garden.

In Ground Planting

• Position is most important so choose a spot that has well draining soil and provides dappled sunlight with protection from hot afternoon sun.
• Rhododendrons require acidic soil, a Ph of 4.5-6 is ideal. Before planting, be sure to enrich the soil with good quality organic content.
• Dig a hole that is roughly twice as wide and the same depth as the root-ball. Gently tease out the roots before placing the shrub in the ground.
• Once the plant is positioned in the hole, replenish the soil and gently firm down. Form a ring-shaped raised section of soil around the outer edge of the plant root-ball, this allows the water to remain where it is most needed.
• Water the new plant in well and keep moist for several weeks until it is well established.
• Mulch well with organic matter, keeping it away from the trunk.
• Apply a slow release fertilizer such as Osmocote 12 month slow release around the root zone in early spring.
• Dead-heading, or removing the old flowers is especially important on young or weak plants.

Planting in Pots

• Choose a dwarf variety of Rhododendron. Some lovely varieties that will do well in pots include Cilpinense, Cowbells, Doc, Pirianda Pink and Russatum.
• Make sure the pot is at least twice the size of the plant and has adequate drainage holes.
• Be sure to use good quality potting mix.
• Remove the plant from the container and gently tease out the roots.
• Position in the pot, replenish the soil and gently press down and water in well.
• Position in a spot that receives dappled sunlight.
• Feed every 6-8 weeks