Brown roots and a funky smell would indicate root rot. Most leaf issues like you describe are caused by a larvae and the best way to treat is to spray the leaves with a product containing Spinosad (like Captain Jacks). Sue – This just might be that the flower is still maturing. The first year or two they were beautiful mop heads and one lace cap slipped in. Your plant stems are turning black because they are infected by fungal diseases such as stem rot, blight, or bacterial wilt. Enjoy the flowers you have and put some organic fertilizer on the plants as well as a top-dressing of compost or earth worm castings. Boggy … So right now they are forming their buds for blooms that will open in 2017. I’ll water very few days..I was so worried it was the heat and humidity that was causing this…. The other half is growing as usual. If it goes below five degrees in your area in the winter, however, this plant might not flower for your in the coming years. We live just 20 miles west of Boston. I live in southwestern CT and all my hydrangeas look very healthy with green leaves but absolutely no buds/flowers. If your temps go below 10 degrees F. where you are, that can kill off many hydrangea buds and some varieties are more susceptible than others. Mhae, Donna, I was given a spray for the leaves. Tip the plants out of their containers and gently pull off some of the existing soil. Water every three days for a longer period, for example, preferably in the morning. Any suggestions??? But if it’s a branch here and there, more random, follow those down looking at the stems carefully. I guess it will grow out or something? More info here. Kathy. It can take a lot of questions to figure out a plant problem and even the most experienced gardeners still have casualties, The pot has drainage holes! Is it a possibility that the cold killed enough stems to make that happen? At this point it doesn't look like it is dying. Thanks. If the temps go below zero f. they are always killed. :( Will the stem still be brown near the root? It sounds like these hydrangeas were potted using one of the moisture-gels that absorb available water, and then release it to the roots as the soil around it dries. My dead canes from last year have white flaky stuff coming out of them all over my new leaves & on ground. If so, how far back should I be cutting down stem? 4 out of 5 stars (562) 562 reviews $ 10.00. Every time I look at it I feel guilty that I did something wrong and it is usually such a lovely little no-hassle bush. I have a pistachio hydrangea that has doubled in size in the 18 months it’s been in my yard here in central California, But the blooms were not at all the same this last season they barely filled in with color at all they mostly stayed green, What can I do to improve color next season, This plant gets early morning sun with dappled shade by midday and full shade by afternoon and gets a deep watering weekly. If you live in a place where the winter temps go below 5 degrees every winter your Endless Summers will be Endless Bummers. You can clip them off if you don’t like how they look. When the rootball is hydrated put it back in the pot and then hold it to gauge how the weight feels, then you will know next time if it feels much lighter. Oh, I’m so sad thst my potted pinky-winky went w/o water in 90deg weather for 4days. Getting foliage wet in the sun does not cause the small brown spots you see – those are caused by fungi, not the sun. Cut the tents out and destroy when you can, and spray the shrubs with a product containing Spinosad (at our store it’s Captain Jack’s) and you should be fine. Is my plant doomed? S, Oak-leaf hydrangeas grown in containers are especially susceptible to the effects of this disease. Reblooming hydrangeas give you more bang for the buck. Be sure it’s kept in a bright spot with good air circulation and let the surface of the soil in the pot dry out before watering again. Zebra is lovely and unusual hydrangea with black stems and white, with a tiny hint of green, large flowers. They have grown really well and lots of blooms but lately we’ve been noticing that the flowers look dry and are turning brown. First, though, there are some varieties that produce a purple tinge and some start to turn purple into the fall. Looking up information and what to do, majority of the tips and such are for infected plants that only have the black spot fungus on a FEW leaves… but mine is covered in them… What should I do for this? All the foliage &flowers completely dried up. Are the “fuzzy bursts” part of the plant or something (insect activity? The plant might regrow from the roots, but it won’t flower. Discard any leaves with traces of mildew or fungus. I’d probably water well anyway, Denise. 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