Percey Thrower, name drop ;D ;D, When i visited Chelsea many years ago he was doing a question & answer, & someone asked a question about bulbs & what to do with bulbs that did not flower well he said feed them in JANUARY with a good feed & then leave them.
I have to say i use this on my tulips & it seems to work they always flower Ok for me.
Hope this helps you. ;D.
All my bulbs are container grown.