How to Care for Azaleas and Rhododendrons

Rhododendrons are a gardeners delight - and so are Azaleas.  Both thrive in acidic, well-drained soil with lots of organic matter.  But what to do when your is clay or loam?

.


The American Rhododendron Society gives lots of valuable tips:

"Before planting test the drainage, dig a hole about 10 to 12 inches deep and fill it with water. Then after it drains, fill it with water again and see how long it takes to drain.  If the hole drains within an hour you have good drainage.  If the water has not drained out of the hole within one hour, the soil is poorly drained and you must correct the drainage problem before planting.  Planting in raised beds is the best solution in heavy soils." 
.

.

Soil pH Value:
"Rhododendrons and Azaleas will let you know if the pH is not correct.  If the leaves turn yellow between green veins then you most likely have a pH problem.  Materials commonly used to lower soil pH are wettable sulfur or ferrous sulfate.  Do not use aluminum sulfate to acidify the soil; it is toxic to rhododendron and azalea roots.  Avoid planting azaleas near concrete sidewalks, driveways or foundations that may leach out lime which raises the pH."
.

.
Soil Mix:  
"About half of the planting medium should be organic material.  Combinations of sphagnum peat moss, pine or fir bark fines, compost, and aged, chopped leaves should be worked into the soil to a depth of about 12".  Oak leaves are excellent."  Read more tips at their website.
.

The South Shore of Nova Scotia, Canada, is blessed with a mild climate, perfect for Rhododendrons.  No wonder that there is such an abundance of Rhododendron in all colors in every garden and here, the Rhododendrons are not just small shrubs, but huge ones, almost tree-like.  See images of gardens on the South Shore at a former blog post.

<><><><><>