I planted a Philadelphus (I think it's Virginal) about 3 years ago, in a sunny spot, neutral but good soil. It didn't flower at all in year 1, last year I got a single flower, and this year there's just a single cluster of five flowers on the whole shrub. It's very healthy and growing vigorously, I pruned it lightly after the one flower finished last year. Can you give me any idea why it's so reluctant to flower?
I planted rhubarb in a shady patch of my garden last year, but moved it in spring to a sunny position once I learnt it needs a sunny location. There is a lot of growth on the plant now (end April) but all the stalks are green, and the centre stalk has gone to flower (it's about 4 ft high now). I'm wondering whether I should leave the plant alone to die back naturally, and hope to have edible stalks next year, or should I cut the flower stalk and / or some of the foliage now?