The herb spiral is a nature-inspired vertical garden design that is highly productive and energy efficient. It allows you to stack plants in a pyramid to maximize space – a practical and attractive solution. You’ll need cardboard, a long stake, organic matter, compost, rock minerals and organic fertilizer, mulch, herb seedlings; (optional) pond materials and irrigation fittings if including. First, have someone hold or bang the stake into the central point of the ground where you want to position your herb spiral. To determine the perimeter, stretch out the string attached to the center stake to mark out your circle, drawing a line in the soil with the other stake or bamboo cane tied on the end of it (or use chalk if you are marking out a hard surface). Keep reading the tutorial in the source.