Except of course it is not premature really, the tiger lily is doing what a tiger lily should do, getting ready to flower now.
So why is this irritating? It is not really fair to label it so as in many ways this is a success. I have tried to grow tiger lilies before and failed. This time I bought quite a lot and planted some in the borders (no sign of them at all) and some in the Forest Deep Root Planter that I trialled earlier this year. They clearly love the planter and have grown well.
I have wandered from the question, so I need to return to it. The reason why this is irritating is that I need these flowers in October for my daughter's wedding. They will form part of one of the bouquets and are a key element. So I have turned to Twitter for advice and I will write again later when I will know if the advice has helped or not. If I cannot keep a flower until the date required it will be irritating, but not exactly the worst thing ever. Que cera etc.....