single greeting card, blank inside One folded 4.25″ x 5.5″ greeting card with a kraft envelope, printed on 100# natural white cardstock, and packaged in a cellophane sleeve. Blank inside. Tips for getting rid of fungus gnats in your plants: Let your soil dry out thoroughly between waterings. Gnats thrive in moist soil. Put yellow sticky traps in your plants to catch the adults. Before you water soak a mosquito dunk in your full watering can for 24 hrs—this will kill the larvae in the soil. Repeat for month or two and the gnats will be gone.