I have just discovered that where I would like to plant 4 hydrangea Seemannii (against a fence) is concrete under the soil. Does anyone know if i can therefore plant them in containers?
THEY GROW PRETTY BIG. YOU WOULD NEED SOMETHING SUBSTANTIAL.AND YOU WOULD NEED TO FEED AND WATER THEM AND NOT IGNORE THEM.
FOUR? THAT IS A LOT OF SPACE TO COVER. ARE YOU SURE YOU NEED FOUR?
Given the eventual height of the hydrangea and the size of container required it just wouldn't look "right".
The container would need to a minimum of two feet high ( to my mind) and, assuming a six foot fence height, you would be chopping off the growth at four feet.
Probably possible, but not ideal - I'd rather find a way of breaking the concrete than commit to mandatory watering for the foreseeable future. Or see if you can plant a bit further out if the concrete only extends so far.
MINE WOULD BE TWELVE FEET HIGH BY NOW IF LEFT ALONE BUT I TRAIN IT SIDEWAYS SO IT COVERS THE BACK WALL OF THE GARAGE, MAYBE 15FEET WIDE, BY ABOUT TEN FEET TALL. AND THAT IS JUST ONE PLANT. IT WOULD BE BIGGER BUT EVERY SO OFTEN A WINTER BLAST KNOCKS IT BACK.
When I have Googled this plant, various nurseries describe it as preferring deep shade and others full sun. I am wanting to plant it in deep shade. Will it grow ok, do you think?
BUT NOT DRY SHADE.
The critical thing is shelter. The leaves can scorch in icy weather, which spoils the look of the plant. For sure, you won't need four of these unless you were covering the entire side of a large building...