Crypts growing plants on leaves

I bought some crypts for my tank about a month ago and besides putting
out new leaves some of the older leaves have began sprouting new
plants. What I want to know is what to do with the new plants. I
want the main plant to bush out, not start new ones. If I cut off the
plantlets will it cause the main plant to put out even more or will it
stop. I read something about it in last months issue of TFH but
didn't get much out of the article except that they are hardy plants.

Thanks for any info I can get,
Vicki