I figure you are talking about making potato grow bags like this:
www.instructables.com...
But the tires aren't necessary. You can do it without them. The tires are mainly just for maintaining the bag's shape.
-Choose a sunny position with as little shade as possible and is free from frost pockets. Potatoes can be grown in virtually all soil types.
-Dig in plenty of well rotted compost or manure in the autumn if none has been added for a previous crop.
-This will lighten heavy soils and give body to lighter ones helping to prevent the leaching of nutrients.
-Rake in a general fertilizer 2 weeks before planting potatoes.
-Do not add lime - growing potatoes like a soil pH of just under 6... slightly acidic.
Originally posted by allenidaho
I figure you are talking about making potato grow bags like this:
www.instructables.com...
But the tires aren't necessary. You can do it without them. The tires are mainly just for maintaining the bag's shape.