Hello! I'm a new member here. I wish I had learned more about gardening before I did the following:
1 1/2 years ago, I planted 90 lemon bottlebrush (calistimon) around my place for a privacy screen. They did OK, growing from 12" to over 3'. Then, last month, they began dying. I had a local outfit test my soil, and it came back at a pH of 8.4 to 10.1! They need 4.5 to 7.5. I augered (5) 1 1/2" holes around each plant down 12" for fertilizer and 24" for gravel. I am now broadcasting and watering in sulfur - this was all advice from a local supply store.
My question is, does anyone think they have a chance of survival? And, if not, what would be a good replacement? I need them to be evergreen, very alkali-tolerant, grow to 8', and be non-toxic to horses. I need about 900' worth of screen, so they need to grow wide, too. Oh, did I mention the soil is clay and extemely poorly-draining?
Thanks for any help!