RobertInAz
Active Member
High all,
I am growing several strains via the StinkBud method (aeroponics), using Botanicare nutrients, and all of my plants have the same problem -- the lower leaves have spots and/or dead areas at the leaf tips. This same thing has happened during several grows and across about a dozen strains, so it appears to be a systemic problem. I also think it's retarding growth. I have included a pic of a typical example -- the seedling pictured is 15 days old, AK47, but they are all doing the same thing to varying degrees. I tend to think that it's a calcium, magnesium and/or iron problem, and I just read the information on the back of Botanicare's Cal-Mag+ supplement that says, "In hydroponics, iron falls out of the solutions relatively fast due to use of magnetic driven pumps without grounding probes and high levels of dissolved oxygen from air stones and pumps." Can any of the experts here at Rollitup shed some light on how to determine whether it's cal, mag, and/or iron, and, if so, how I can calculate the amounts needed to fix the problem, or what else I could do to correct this?
Thanx, Bob
I am growing several strains via the StinkBud method (aeroponics), using Botanicare nutrients, and all of my plants have the same problem -- the lower leaves have spots and/or dead areas at the leaf tips. This same thing has happened during several grows and across about a dozen strains, so it appears to be a systemic problem. I also think it's retarding growth. I have included a pic of a typical example -- the seedling pictured is 15 days old, AK47, but they are all doing the same thing to varying degrees. I tend to think that it's a calcium, magnesium and/or iron problem, and I just read the information on the back of Botanicare's Cal-Mag+ supplement that says, "In hydroponics, iron falls out of the solutions relatively fast due to use of magnetic driven pumps without grounding probes and high levels of dissolved oxygen from air stones and pumps." Can any of the experts here at Rollitup shed some light on how to determine whether it's cal, mag, and/or iron, and, if so, how I can calculate the amounts needed to fix the problem, or what else I could do to correct this?
Thanx, Bob
