Lime free soil
can anyone tell me if lime free soil is essential for growing the strictly terrestrial broms such as Dyckia, Hechtia, Deuterocohnia, Puya etc? I have read that broms need lime free soil, but I have also read that lime can be added to the soil for terrestrial species! Very confusing...
Any advice, especially from those growing terrestrial broms in non lime-free soil, is appreciated. Currently I use an ericaceous John Innes (ie soil based rather than peat based) compost with grit as my soil mix, which works very well, but Lime free JI is getting hard to find.