Hi Marvin
Mostly likely the brown edges were caused by drought stress. Salt burn and soil compaction can also cause the same symptoms.

Hi John
1. The only fertilizer you can apply after mid-August is a root starter to stimulate new root growth before winter. If you promote new leaf growth, it may not harden off before winter. Otherwise, fertilize your hydrangea with a 10-10-10 in late winter to e. spring before growth starts. Spread the fertilizer at the base of the plant.
2. For planting ideas see the article on Endless summer hydrangea.

Hi
I’m guessing that you have a Annabelle hydrangea. They produce rounded flower heads and have a tendency to flop over. When Annabelle hydrangea flowers mature, they turn a green color and if you leave them on longer they will dry and turn a tan color. Next year they will again bloom white flowers.
H.arborescens”Annabelle” blooms on new wood, so you can cut it down to 1/2 size or 6″ above the ground in the winter or early spring. This will help produce stockier stems and more flowers. No pruning will give you less vigorous growth and smaller flowers.
You cannot change the color to pink or blue on this variety.

Hi Wendy
Your hydrangea could had winter damage -where the buds were frozen. Perhaps you pruned them too much and at the wrong time? Other factors are too much fertilizer or increased shade can also cause your hydrangea to stop blooming.

Hi Jerry
Best time to transplant Hydrangea is early spring before it buds or in the fall when the plant is dormant. Any other time you can put the plant in shock and it may have a difficult time recovering. When you do transplant irrigate and baby the plant like a new planting. When digging up your hydrangea try to get as much of the rootball as possible. Unless you prune or trim your mophead hydrangea right after bloom, you may be cutting off next years flowers.

HI Rick
What you need to do is pick out one straight dominant stem and remove all others. This will focus all energy on the main stem. As the stem grows and gets taller, remove any side shoots or growth that may show up on the stem but leave the top growth. This process takes a few years. It’s just like making a topiary.

Hi Rick
I am assuming that your Pink Diamond hydrangea is already in a rounded tree form at this time. Do you want to keep it that shape or do you want a more triangular form? Once the hydrangea stops blooming, it will continue to grow making it larger overall. Or are you starting with a shrub and trying to make it a tree?

Hi Terry
What kind of hydrangea do you have? Do you fertilize your plant?

Hi Eve
Yes, according to the US Army center for Health, the flower buds are the most poisonous. Symptoms after injestion: cyanide poisoning, abdominal pain, vomiting, & lethargy.

You can use a special formulated fertilizer for hydrangea 10-10-10 is a general fertilizer that works for most plants. Fertilizing and pruning applies to all hydrangea. You don’t want t encourage new growth after Aug. because the new growth may not have enough time to harden before cold weather sets in.