Question: I want to plant tropicals in raised planter beds in my southern california garden. Exisitng soil is mostly fluffy potting mix without much natural soil in it. The mix is so fluffy, with humis, perlites,etc.it doesn't hold moisture. What do you recommend I add to the potting mix soil to make tropicals and sub tropicals(canna, calla, ginger, palms, ti, ferns, begonias, bannas, etc. thrive?
Answer: The easiest way to change the structure of your potting soil is to add one part good garden loam. The sand and clay inherent in garden soil will provide bulk and the moisture retentive qualities you're looking for.
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