Apparently urea or ammonium (NH4) is not good for indoor seedlings due to the cummulative effect that can occur. The ideal seedling fertilizer has a 2:1:2 (N:P:K) ratio. Nitrogen should be in the nitrate (NO3) form. Fertilizer should be applied once a week to seedlings that have their true leaves. I am still going to wait until they have their 2nd set of true leaves.
-- and yes I watch too much Spongebob Squarepants!References
Jeorgensen, Kenneth. (December 4th, 2003). Suite101.com: Choosing Seedling Fertilizers.
Janne, E. E., Roberts, R. E. (February 2001). Texas A&M University. Timely Tips on Starting Seedlings at Home.
Very good to know. Thank you for the information!
ReplyDeletejennifer
so does this mean we lost some seedlings?
ReplyDeleteNO seedlings were injured during the experimentation. It just means that I won't urea on your seedlings. Is that ok?
ReplyDelete