Can I use commercial cacti soil for potting an Angel Wing begonia. I also have on hand, orchid mix. Could I mix equal parts of the cacti and orchid soils? I have one more question. I have an "ancient old fig bush." There have been years when I have had two crops, June and October. Last year I was making fig jam nearly all summer and fall. This spring we had to cut it completely back --- So, this year I have all new growth, approximately 6ft high and 4 ft in diameter ---- What is the best MULCH for me to use to protect it?