The Q&A Archives: one p.j.m. rhododendron wont bloom

Question: I have three p.j.m.rhododendron for the last two years only two blooms and one dont why is that or do i need to plant another.

Answer: It could be that the soil pH isn't quite right for the non-blooming PJM. Rhodies like an acid soil. If yours is alkaline, you may want to adjust it (with applications of sulphur), to increase the acidity. Have your soil tested, or test it yourself to see what the pH is. Rhodies prefer soil pH of 4.5 to 5.8. If both the exposure and soil acidity are correct and your plant still isn't blooming, try pruning to encourage new growth. Cut some of the stems back to a whorl of leaves. Latent buds on the stem below the leaves will sprout and grow new stems. These stems will then develop whorls of leaves, and a flower bud at the end. It will take two years from pruning for the stems to grow and the flowers to open - but it's worth the wait! When the flowers have faded, carefully snap the trusses off to make room for the new leaf and flower buds to develop at the top of the stem. Hope this helps!

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