Now that we've got our asparagus fern planted and watered, you may consider after they germinate, you see some green growth coming which will take as much as 10 weeks consider some fertilizer. It can be a foilier soil treatment or transplant type fertilizer. This is an organic that I use. It is liquid and it is easily mixed with the water that you water the plants with. All you are going to do between the time we planted these and the time they actually come up is keep the soil moist. You don't need to keep them wet. But I wouldn't worry about putting fertilizer on them until you actually see some green growth because your fertilizer is really not going to do a whole lot good until the plant is putting up green growth. It is making conceivably headway under the ground but it is not going to make much use of fertilizer especially additional fertilizer until the plants goes to putting up green leaves and performs a photosynthesis that is when fertilization becomes more important.