Anyone familiar with planting and maintaining hydrangeas?! I've got 13 hydrangea plants they are 'Nikko blue' and 'Merritt's supreme'. We have two 20ish foot long beds and I had planned to alternate the 'blue' & 'pink/purple' but was told it would be hard to get these colors. We used a tiller on the beds and added compost, fertilizer and peat moss a week or so ago. We are located in north eastern ky, zone 6b. I've been told to add lime to one color and aluminum sulfate to the other. I'm sort of confused and brand new to gardening. This is a smaller variety reaching 3-4ft high and 3-4ft wide. What do you recommend for spacing ? I was told by someone locally I have to many plants but I want them to be together not to view as each individual bush if that makes sense. Any advice is welcome!