Hrdrangea - Knowledgebase Question

Name: Russell Shafer
Mercer, Pe
Question by betweentwo
June 30, 2010
How long after planting does it take for a hygrangea bush to bloom. Mine is two years old.
Thank you

Answer from NGA
June 30, 2010


Sometimes it takes a while to get hydrangea to flower. They like to grow in well drained soil, high in organic matter (compost, leaf mould, composted cow manure, etc.) A helping of any one of those in the spring and fall will really help your plant to grow better (and improve soil composition). Hydrangeas prefer full sun or partial shade. If they don't bloom after the third season, consider moving them to a more appropriate site. Of course, moving them will disrupt flower production too, because transplanting disturbs the roots and sets the plant back. It may take a few years to recover but the plant should eventually bloom. Overfertilization with a fertilizer high in nitrogen can also cause problems. This can result in a lot of vegetative growth but little to no flowering. Don't use lawn fertilizer if there's grass around the shrub and apply a fertilizer high in phosphorus and potassium such as 5-10-10 in the spring being careful to follow instructions. Hydrangeas do not require a pruning yearly, but when you decide to prune it should be done in late summer after blooming. Since yours are not blooming, this is obviously a challenging situation. When they do start to bloom you should prune stems that bore flowers to just above the nearest outward facing bud. Leave all new shoots uncut. Good Luck!

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