By John Verwolf
NRS Soil mixture for Rhododendron cuttings
1st year for 4’x4’ containers – 50% Western ground bark; 50% perlite – mixed with water.
2nd year – transplanting into 1-gallon pots – 50% western ground bark; 25% perlite; 25% fish compost.
Add to it
2-handfuls of Dolomite lime on 4 cubic feet above mixture.
2-3 teaspoon on 4 cubic feet of Iron Sulphate and Sulphur.
1/3 teaspoon manganese (not magnesium).
1 handful of rhododendron fertilizer.
Mix all the above with water.
Use the same combination when transplanting from one gallon to 2-gallon pots.
IMPORTANT: soil must be premixed at least one week ahead to give the soil time to absorb the water.