Plants turning yellow…

Question

I don’t understnad why my tomato and beans plant leaves that I keep in greenhouse are turning yellow. I am giving them enough water, but still the same. If I need to use fertilizer, what kind should I use?

Answer 1

These articles may help: https://www.gardeningknowhow.com/edible/vegetables/tomato/yellow-tomato-leaves.htm
https://www.gardeningknowhow.com/edible/vegetables/beans/yellow-leaves-on-beans.htm