Terrie, it is obvious that your grandson hasn't read the book on how to grow the
'average method' as authorised but the
'experts', but is doing his own thing - and isn't it a relief that spring is nearly here and he can start wearing shorts rather than trousers - because lets face it, it sounds like he is achieving that all by himself
I hope he is feeling better soon, and good luck with the 3 days bed rest - that could be hard work on everyone around, if he is a get up and go sort of character.
PS I think that you should stop putting the fertlizer in his shoes for a few months