Lilac bloomed when bought, not now

[Maineiac]

Hi everyone. I bought 2 lilacs last year (the type is French something or other..deep purple blooms). When I bought them they were about 3.5 ft tall and had blooms.

The leaves are gorgeous this year but I have no blooms. Im thinking I may have messed them up by adding a little bone meal to the hole when I planted them.

Also, one was in a biodegradable pot that I left it in and one was not.

What should I feed them with?

Thank you!

[Maineiac]

Anyone? Bueller?