Every winter it’s the same. Plant the wheat/oats/ barley or whatever, express amazement at how fast it grows, then plant some all over a week or two later because it dies so fast.
I would settle for slower growth and longer life. Is there some secret to keeping this longer? I only have a west facing window to put it in. The east facing windows are shaded by a big tree.
I’ve been growing indoor plants for decades. It’s just cat grass that doesn’t seem to work for me. Heck, I even got one of those grocery store orchids to bloom again every winter.