I’m not sure of the brand but I bought 2nd early potatoes in Woodies and I planted them in the fold-up tubs that they sold (circa 60cm high). I brought the earth bit by bit to within 15cm of the rim of the tub. I now have 2 ft st green stalks coming out of the tub with a lovely purple blossom. These stalks are now seriously falling over the edge of the tub and I was afraid that they might break so I have staked them up with bamboo sticks. Is this ok or should I let them fall over? When should they yield some sort of crop?
Readiness for use depends on when planted but you can always tease back some soil carefully and if they are reasonable size you can use a few while leaving the plant and other tubers intact. When you cook them you will know if they are ready, not too soapy.