I haven't used a whole lot of liquid fert but am still experimenting with it. With the cooler temps now in my area I am going to try some things. One product I am looking at is Agri-Plex by Roots/Lebanon. The cost per K for a monthly app (2oz) would be around 92 cents. Is this a decent cost for micros/iron mix? I am very limited in what products I can get, working on it but very limited suppliers.