Absolutely
Anything can get into your closet, there isnt any way you can have a closet grow sompletly air tight and sealed up.

Just take precautions, sanitize everything, equipment, soil. Watch for first signs of pests, and deal with them accordingly early, so now harm comes to your plant.
Jkrustie Reviewed by Jkrustie on . Rockwool grow journal - Updated Daily! Ahoy there maties! Time for a grow journal to begin! Here are a few specs of what I have going on: -Seedlings started in paper towel (08/31), germed into 1 inch rockwool cubes (09/03), planted into the 3 inch rockwool cubes(09/05), then transplanted to buckets(09/21) -Seedlings are now 20 days old, growing in Rockwool using Grodan Grow cubes(1cm x 1cm cubes) Rating: 5