I searched the forum and couldn't find this so I thought I'd ask. Anyone know if it is safe to use miracid on potted hibiscus that we are feeding our tortoises? We clip blooms and leaves for them but the plant likes an acidic soil and I don't know what is safe to use. I haven't added any fertilizers and the plants are starting to look a bit under the weather. I've looked all over online and haven't managed to come up with any results.