Answer: Lace cap hydrangeas are hardy in zones 5-9. You didn't give us a clue as to where you are gardening so I don't know whether or not this plant is recommended for your growing region. Most often when a hydrangea won't bloom regardless of the good care you give it, it's because it is the type of hydrangea that produces flowers on new shoots which develp on old wood. If you're regularly cutting off the old wood each year, or if it freezes down to ground level, there will never be any old wood for the new flowering shoots to emerge from. As a result, you won't get any flowers - ever. If this is the case, you may want to replace your hydrangea with one that flowers on both old and new wood. Endless Summer is one such cultivar.
Best wishes with your garden!
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