Hello, I planted a bunch of oriental lilies in March and I have had flower buds on them for the last couple of weeks, but they just don't seem to bloom. Is this normal? Am I just being impatient or is there an issue I need to and can hopefully address?

Apart from spraying stinky anti-rabbit spray I haven't done much to take care of these. They do get water regularly, so that shouldn't be an issue.

Thanks