Yellowing

[Thyming]

This is after 2 weeks of growth. They were looking good up untill the last few days. They are in a mix of Miracle Grow soil and Pro mix. I have two 100 watt compact fluorescent bulbs on them. Any ideas what could be causing this?

 

[Jackalope]

First guess would be nitrogen deficiency. Yes I said "guess". Lots could be going wrong. Miracle Grow soil has nitrogen in it. Maybe they are not getting enough. At this stage you shouldn't have to add much in the line of nutes. PH and other things can effect how a plant accesses nutes in the soil. That's my take. I know I didn't solve anything maybe when people tell me how wrong I am. Your problem may get solved. Good luck and Good growing

 

[Thyming]

Ok
Thanks for your input. Every little bit helps. I am using miracle grow soil mixed with pro mix, maybe to much nutes

 

[macsnax]

Do you have drainage holes in the solo cups?

 

[Thyming]

I do now. No water came out when I did though.

 

[Jackalope]

Good thinking Thyming. I never thought of drain holes. Been growing so long that drain holes is second nature to me.

 

[FutureFarmer]

Definitely simple but very useful information much appreciated