POLITE pinning is LOVED in fact I'm potty about it!
Rhubarb forcers are bell shaped pots with a lid covered opening at the top. Used to cover rhubarb to limit photosynthesis, they encouraging the plant to grow early in the season and also to produce blanched stems. The pots are placed over two to three year old rhubarb crowns during winter or very early spring. Once shoots appear the lid is taken off, causing them to grow towards the light.