For several years the potted Lily had beautiful yellow blooms clustered very tight looking real nice without any fuss. Just nip it all down for fall/winter storage and keep in the shed. This year it did not bloom at all but has the healthy looking green foliage. Leaves me scratching my head. It was however cheated of sunlight and water when we were away for 10 days, looked anemic, but came back beautifully. Still, no blooms. Any ideas?