This leek was bred by Keith Forster . I have grown this leek since Keith released it about 10 years ago. It has the ability to grow to an enormous size and weight, and holds the current world records for heaviest and largest cubic capacity.
The giant is an easy leek to grow to a large size and retains good quality up to sizes of 17 to 18”. Most growers will try this leek and if they are lucky will get them on the bench and win there show.
I say lucky as there is a downside to the giant. It is a hard leek to keep under 6”.
I have also seen double centres and suckers and the giant is also prone to holes in the rootplate.
I would not recommend growlights in growing this leek. The stock plants produce a very small head, Usually of small pips like grains of wheat. Also very reluctant to produce king pods. Worth a try and you may be lucky. Good luck.