About twice a week, prune the plants to prevent overgrowth and blossom end rot (although pimpinellifolliums are not very susceptible for blossom end rot). This can be excess leaves, branches where fruit are not being pollinated, areas where clusters have already been harvested, off of the top of the plant to keep from getting too tall, etc. If a cluster that is being pollinated is accidentally pruned off, find another, newly emerging flower cluster, tie a mesh bag near it, and begin to pollinate that one instead.