By Tonyl
Northumberland,
United Kingdom 
I have 2 rhododendron bushes in my garden, they both have large buds on but should they have flowered by now, I was in a local park (north east England)recently and a lot of them were in full flower?
19 May, 2016
Answers
Thank you Rosie.
19 May, 2016
Mine have had big buds for several months but no sign of opening yet. Rhododendrons cover a pretty long season between them.
19 May, 2016
Have mine are still in fat bud ready to burst open we so need more sunshine Tony.
19 May, 2016
Some of ours are long finished, some are in flower now whilst others are yet to flower.
19 May, 2016
I agree with above. Your rhododendron is probably just fine, so long as the buds are green and healthy. Not all rhodies flower at the same time. I have 3 rhododendrons on my property; 1 is in full bloom, the other 2 just have swollen buds. They will flower a little later as they always do.
19 May, 2016
It depends on the variety, but my neighbour's have only just begun to flower, a lot later than in previous years.
19 May, 2016