What Causes Brown/black Spots On My Hydrangea Leaves?

Hydrangeas are shrubs that flourish best in cool and well watered soils. Curling of the leaves and the appearance of dark or brown colour can be due to over exposure of sun, heat and wind.

This plant has a tendency to alter in colour depending on the soil type which is what makes it so desirable to gardeners. The best soil types for hydrangeas are organic, acidic and moist soils. By having a compost pile consisting of dead plants and leaves developed over time, you can improve most soils. Light and sandy soils may require the addition of fertilizers. It is very important however, not to over feed this plant as this will result in a light, leafy growth.

Normally this plant should have a nice green colour in their leaves though there are several species of hydrangea that can affect how the leaves appear. There are about 23 species of hydrangeas including the oak leaved hydrangea and the climbing hydrangea as well as the common hydrangea. The oak leaved plant has deep coloured leaves hence the name, which turn a dark red.

Fungal diseases can affect the leaves drastically. Brown spots occur usually in late summer due to too much sun exposure. These fungal spots can be brown, grey or purple though if the leaves contain yellow coloured marks; this could be the result of rust.

This may sound like a contradictory answer, it could be too much or too little water. The inconsistency of watering could well produce brown spots. They can also form if the leaves get wet and then the sun comes out and the water droplet acts like a magnifying glass and attracts the sun which scorches the leaves in circles.

Too much exposure to hot afternoon sun or lack of watering. Hydrangeas like limited morning sun and deep watering early in the day. Sometimes viruses or parasites can cause leaf withering. A virus or fungus canalso present blotches or yellow spots. Any parasites with have some evidence of bugs or bug nibbles.

They like shade. If they have been in the sun the leaves will turn brown. Be sure to check behind the leaves and make sure there isn't little black bugs on them. If there is you will need to spray them with Garden Safe fungicide soap. But I'm am pretty sure they just got too much sun. Keep them in the shade.

There is also the chance that over watering and over sun can cause the leaves to turn brown on the edges.   If these are in a high traffic area then you might also need to trim them back as each time a leave is bumped, touched or rub they will go into shock

I suggest that you water it more and keep mild sunlight to it...this should help it.

Sounds to me like they have mites on them. You will need to spray them in the shade with Garden Safe insecticide soap. It works, but keep them away from you other flowers if you can. They spread fast.

I have hydrangea and I'm having problems with black spots, what ca I us t ge rid of this fug us

Could also be salt burn, drought stress, or soil compaction symptoms. Try giving it less fertilizer, water well and fluff up the soil

Hydrangeas like soil that has a balanced ph level. There are commercial potting soil mixes for these type/family of plants, "hollytone" is one good brand. The ph level also determines the color of the flower, which can change due to the ph. As to the browning of the foliage, possible causes are, it was heat damaged and cannot now be brought back by watering; or it has powdery mildew disease which requires a chemical treatment. A good resource for plant diagnostics is your local cornell univ. Cooperative extension, if available. Also, ask at the nursery or plant store where you bought the plant. Sometimes plants are sold that have diseases and you don't see this until some time after you've had the plant. What a shame! Get yourself a new healthy plant and enjoy!

They need more water sunlight and other stuff

Re-mix soil with one part regular old backyard dirt, only water a little bit and by that I mean count to 5 plants stay alive.

I say water it and put it in the sun make sure no bugs (beatles,sslugs) are on it!!!!