| First, when planting next to walkways and foundations, one must take into account the lime that leaches out of masonary and tends to sweeten the soil. Azaleas need an acidic soil and this lime neutralizes the acidity in the soil. This can be compensated for with powdered sulfur that is worked into the soil before they are planted and spread on the surface after they are planted. You don't want to jam too many plants into an area. They need room to get sun and air. As a ballpark guess, I would guess that your azalea will be about a 18" to 2' plant and may grow to twice that size eventually. Hence they should be about 2' to 3' apart. The hole you use to plant should be about twice the size of the current root ball. You don't want the planting holes to touch. |
Here is a link that might be useful: How to grow azaleas.
