Hope this isn't too late for an answer, but I suspect that is all your lily is going to do this year. The lilies I have grown get bigger--with more buds--as they mature--the clumps get bigger too--so I would guess that you will get a much better show next year.

Your lily is getting plenty of sun, is it not? If not, that could cut down on the blooming also.

I'm not an expert on lilies, but my orienpet lilies (which Silk Road also is) get bigger and better each year.

Kate