| If root bound, the loss of a percentage is OK. I've often had to literally cut off the bottom 1/4, to be able to open up the root system to get the old mix out. But, not all Catts, by nature, are good rooters. Some are very skimpy rooters, and these need all the roots they have. Also, remember that a broken root may well die below the break, and repotting will often break a large percentage of roots, especially where roots have wound round and round the inside of the pot. If you are repotting at the exact right time, the broken or cut roots will be replaced very soon, so there will be very little set back.
As far as cutting roots acting as a stimulant to rooting, I have not seen this, but I won't say it doesn't happen, just haven't any opportunity to observe it.
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Cynthia
Prescott Orchid Society  |