Most varieties hold their leaves for two years and then in the third year, as summer progresses and autumn nears, the lower leaves drop off the stems. They add drama and a pop of colour to your garden, and come in a range of varieties. Most Wellington soils are the right pH for Rhododendron but you can dig through peat or add aluminium sulphate to bring it down. How to grow rhododendrons in a garden. Keep mulch away from the plant’s stem as this can lead to rot and pests. Rhododendrons must have plenty of water. If the plant cannot be transplanted immediately, it can be put in a container with plenty of mulch to keep the roots from dying in cold temperatures. They make fantastic container plants with thick shiny leaves and waxy flowers. Vireya (tropical) Rhododendrons have glossy leaves and flower for many months. Posted by on 18 November 2019. Tropical: Position in full sun to dense shade. The flowers appear in … Product safety recalls: HPM Hot Water Connection Kit. Enrich the soil with some compost and Yates Dynamic Lifter Soil Improver & Plant Fertiliser before planting. Make sure they are not shaded too heavily over the summer as this could inhibit flower bud set for the following season as well as encourage the plant to grow leggy and become sparsely foliaged. Space plants 2 to 6 feet apart, depending on their estimated mature size. They can grow from 50cm up to 4 metres. After planting put down a layer of mulch to conserve moisture and help keep the weeds down. At planting time, use 10-10-6 fertilizer before you water the plant in. We were but one of several rhododendron nurseries in Taranaki and to … Growing them is easy, this guide will show you how. Dig the planting hole twice as wide and to the same depth as the root-ball. These plants form a branch of the ericaceae family and can offer a wide variety of plant sizes, flower colours, foliage types and plant forms, as well as lending themselves to interesting groupings. They have a very shallow root system so they can be easily grown in the garden. Cut the leaves in half to reduce water loss and stick in potting mix. They combine well with Azalea, Camellia and Pieris and will look good with trees such as Cornus (Dogwood), Acer (Maples) and the range of Magnolia. Generally, the conditions will have one of the above three points going for it. There’s a broad range of mature plant sizes and temperature tolerances among rhododendron varieties. When pruning, look for a growth bud on the stem that you are wanting to cut. Cutting in the winter is the best way to ensure that your plant will have new growth after you prune it. Without enough water in summer rhodos shut down their flower production for the following spring. Prune just above the bud and new growth will appear there. Brown-black specks on the underside of leaves. Rhodos don't like their feet to be sitting in water, so ensure that the soil is free draining. They prefer full sun in winter, and part shade in summer. The two main things to consider when selecting rhododendrons are your hardiness zone and the amount of space available for the plant to grow. Move the plant to a more sheltered position, increase watering and mulch around the shrub. Rhododendrons have fibrous root structures which are masses of tiny hair like roots that stay close to the surface. Early symptom - light brown or whitish coloured circular spots on petals. Spray at two weekly intervals fungicide. It is commonly thought that Rhododendrons only grow in a cold climate, but tropical varieties are also available that prefer more temperate climates. Most Wellington soils are the right pH for Rhododendron but you can dig through peat or add aluminium sulphate to bring it down. Besides the dazzling displays of flower, it is the variety of foliage and growth forms that make them such valuable landscaping plants. 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