Greetings to everyone on this great forum from a new member.
I am have been growing hydroponic lettuce for about 6 months using an NFT system with very few major problems.
Recently I have come across a problem with my lollo bionda.
They seem healthy enough but they are growing an extremely dense head like iceberg, instead of being loose leaf.
I am using Howard Resh formula at an EC of 1.3 and Ph 5.8-6.3.
Any help would be greatly appreciated.