Answer: There are only a few things that will prevent a hydrangea from blooming. If it is a big leaf hydrangea (macrophylla), it blooms on new shoots which develop on old wood. So, if your hydrangea freezes down to ground level each winter, there will be no old wood (or very little old wood) on which new flowering shoots can develop. The same applies if you prune your hydrangea down too far. A few blooms indicates that some old wood survived, but not enough to produce lots and lots of flowers. There's not much you can do about this, except hope the winter doesn't kill everything down to ground level.
Stella d'Oro lilies can be divided in early fall. Water them well after replanting and next year you should have new plants with lots of flowers.
Enjoy your garden!
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