Oakleaf Hydrangea Flowers Turning Brown
Soil that is either too acidic or too alkaline can quickly cause your hydrangea flowers to turn brown so it s essential to have your soil tested to determine the right kind of fertilizer needed.
Oakleaf hydrangea flowers turning brown. And if a hydrangea is given a strong dose of aluminum sulfate to turn the flowers blue when it s dry that also can cause brown blooms. Always use aluminum sulfate at the rate recommended and make sure the plant is well hydrated first. Plant them in an area that receives afternoon. To counter major attacks spray the foliage of vulnerable shrubs with a product containing bt bacillus thuringiensis just as the caterpillars begin feeding according to label instructions.
The first sign of root rot is usually entire branches blooms and leaves turning brown. Just clip off those brown flowers below the bloom. For minor infestations crush the larvae in their rolled hideouts. Other factors can turn hydrangea flowers brown.
When it s hot a hydrangea looses lots of water from both leaves and petals and so dry out quickly. All hydrangeas need well drained soil but oakleaf hydrangeas are particularly susceptible to root rot. Leave the canes and leaves as the plant will be making the germ of flowers for next year soon. Affected hydrangea foliage becomes ragged and unsightly turns brown and dies.
Yes it s probably the heat. If a plant is given a strong does of fertilizer when it s dry you ll also see browning flowers and leaf edges. For example hydrangea flowers can wilt and the edges of the petals can turn brown from heat stress.
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