Forcing Paperwhites Only Once?
I've read again and again, here and elsewhere, that forcing bulbs - daffodils or paper-whites amongst others - depletes them so that they won't flower again. I now accept this as a matter of faith, but I'm wondering: why? I don't doubt that it's true, but why does that happen? Daffodils will obviously flower year after year if they're planted outside, and surely the same is true of paper-whites - at least within their narrow hardiness band. If nurseries are able to supply them, they must find a way to grow them a few years running anyway, and I'm wondering what the difference is? If they're planted in a deep pot, or given enough space and sunlight will they still not flower again? I live in an apartment without a yard, and they grow beautifully in the windows, can I find a way to bring them back next year (or maybe the year after that)? I know I could buy more, but I'd like to stick with them, if you know what I mean. Any thoughts out there?