Hydroponics

Why are my watermellens that i’m growing in a hydroponic system dying?

I’m in a hydroponics class and i’m growing both pumpkins and watermelons in the same system but in different barrels. The pumpkins are growing great, but the watermelons are dying. I have not added the fish yet, but the nutrient levels are right. Both i and my teacher have tried to figure this out but can’t, any suggestions?

I thinks that this is not the best time of the year to start planting watermelons or pumpkins, they like lots of heat and sun, they are late spring /summer plants. Watermelons and pumpkins are big plants they need lots of room to grow.
Best of luck.

How To Hydroponics – S02E20 Hydroponic Giant Pumpkin Part 02