The term pricking out means the transfer and separation of young plants that are too close together. For fruit-bearing plants, it is best to choose a fruiting day (Aries, Leo, Sagittarius) when the moon is waxing.
The waxing moon is also generally considered favourable, except in Aquarius.
Um to avoid the seedlings hanging limp in the ground in a short time, avoid the waning moon, especially in Aquarius.