Alice our Lowe's had a buy one get one last week on Miracle Gro granules. I bought 4 for the price of 2 - just the blooming food for roses but I use them on my plumerias. They have different kinds but I have plenty of all purpose already. Lowe's much cheaper than Costco. I wonder if I can use them on orchids but I'm afraid to try. This year I have too many experiments on my orchids already and looks like I'm starting to see improvements. More blooms and longer blooming season.
I am just now starting to use Epsom salt so not sure yet if I'm going to see the benefit soon. I just mix it with my water soluble orchid food. I have a big bag of it so I plan to sprinkle a little bit on my plumeria top soil.