Maize, beans and squash are a classic planting combination. Called the ‘three sisters’, this grouping has been used by Native Americans for centuries as each of these plants helps the others. The maize provides support for the beans. The beans provide nitrogen. The large squash leaves sprawling on the ground create a living mulch, smothering weeds and keeping the soil moist. The prickly leaves of the squash also keep many destructive pests away. With popcorn, this planting mixture can be achieved using a miniature pumpkin such as ‘Jack Be Little’. Plant the popcorn seeds first, and when seedlings are about 12cm high, plant climbing beans at their base. About a week later, plant the squash seeds around the edges of the block of popcorn and encourage the rambling squash to grow underneath it.