Q: I heard you on radio tell how to grow potatoes in perlite. Can you provide a printed reference?
A: I’m growing a perlite-filled plastic tub of Irish potatoes on my patio right now! I filled the tub part-way with perlite granules in mid-March and planted five potato seed pieces in it. Leaves appeared a week later. When they were six inches high, I filled around the stems with more perlite. I’ve fertilized regularly. When the stems emerge from the top of the tub I’ll add a final layer of perlite and let the plants grow until June harvest time. Details at xrl.us/POTATOPERLITE