I mentioned in my previous post about planting potatoes in cardboard boxes. Well, I have decided to do a little experiment this year, comparing all the methods I use for potato growing.
In the past I have used car tyres for growing potatoes but became worried about the contents of car tyres leaching into the potatoes. Besides, cardboard boxes are a lot easier to get hold of than tyres and free tubs. The boxes only need to last a season and can then be composted after the harvest.
In the past I have used car tyres for growing potatoes but became worried about the contents of car tyres leaching into the potatoes. Besides, cardboard boxes are a lot easier to get hold of than tyres and free tubs. The boxes only need to last a season and can then be composted after the harvest.
In a corner of the garden that is not much use for anything other than potato growing I have a few tubers already sprouting.
To use cardboard boxes for growing make sure you open both ends of the box so that there is drainage and room for roots to find their own way. You are merely using the box to hold earth up so that it doesn't spread around.
The box on the right I used as a surround for existing plants and the one on the left is for some new tubers. I placed two seed potatoes on the top soil and placed a shovel of earth on top of them. As they grow the box will be earthed up. The potatoes that don't have a cardboard surround will act as a control to compare yield. After harvesting the potatoes, the boxes will just be dug into the soil as worm food.
Over the years I have noticed that good earthing up affects yield. In deep beds earthing up material settles and moves away from the plant stem. In plastic tubs the earthing up material is constrained by the walls of the tub and the crop yield is higher.
