26+ Dark Spots On Hydrangea Stems

Black stems white spots saga a reader s hydrangea seems to have caught a disease darkening the stem and causing white spots.

Dark spots on hydrangea stems. Anthracnose can be fatal to hydrangeas so prune out dead or diseased plant parts and destroy them. They are most prevalent in moist conditions although some occur in warm periods while others form in cooler temperatures. It looks as though the plant may be indoors. To keep fungal spores from spreading also remove mulch from the affected area. Since most ailing hydrangea symptoms are foliar the number one cause is usually fungal. Spring pruning to thin your hydrangeas allows more air to reach their interiors dry the leaves and. Apply 2 inches of fresh compost to the soil to smother fungal spores and to aid in disease prevention.

The fungus does not spread to other plants. Remove all dropped diseased leaves from the ground and discard. Unfortunately the possible causal agent that i ran into is not a good one. Also called gray mold disease botrytis can turn infected stems brown black not just the tip but the whole stem eventually. It does not harm the plant although it can look pretty awful at times. Although not part of the plant fungal spores can. Trim the oldest and largest stems to the base each spring and after flowering using bypass pruners.

The black spots on the stems could be normal it s hard to say without a sharper close up. The stems may also have black or purplish spots. If not treated black spot will leave your rose garden not only naked but significantly weakened and unprepared for the next winter. What i wonder most is what potting mix it is growing in it looks an unusual colour possibly rather dense and the potting mix comes almost to the top of the pot. Gardening expert val bourne advises. How to treat a black spot on hydrangeas cercospora leaf spot. Please research a fungal infection in hydrangeas called botrytis usually more common on macrophyllas.

Treat a black spot on hydrangeas trim the oldest and largest stems to the base each spring and after flowering using bypass pruners. Leaves petals and stems will exhibit. Remove all dropped diseased leaves from the ground and discard. Apply 2 inches of. Like most fungal diseases black spot thrives in wet humid weather usually when temperatures are in the mid 70s fahrenheit. You can also identify it by cankers that form on stems and branches. This is a leaf spot fungus that develops in rainy periods or when hydrangeas are hit with frequent irrigation.

Although cercospora leaf spot fungus cercospora hydrangeae strikes in spring its spots. Leaf spots caused by cercospora alternaria phyllosticta or anthracnose stem from a fungal disease.