By pinning the main plant, you're just preventing it from maturing and producing new leaves. The current leaves will continue to collect energy for their normal life expectancy and the corm and roots will continue to grow. It's a simple and extremely effective way of producing more pups without having to use the resources of the main corm.

This system prevents the problems associated with decapitation and false-decapitation.

Originally Posted by cincinnana I do not fully understand pegging, is this common practice to force growth to the pups? Does it cause a slow death to the main stem or are you just starving it for the benefit of the pups without the true shock of just cutting it off.

Originally Posted by Richard I think "resources" would be a better description than "energy".