Cattleya with diseased new growth

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Good job growing!

Don't cut leaves nor pseudobulbs off orchids unless they're diseased. Just let them age naturally, turn brown and fall off on their own. Sometimes you will need to cut off old, dead pseudobulbs. Most people do that when repotting so as not to disturb the plant in the pot.

Cattleya leaves normally live for quite a few years before browning and falling off.