Daffodils & Yellow Jugs

I wanted to paint something with more colour than my recent work, so I chose these pale yellow daffodils which were in a yellow jug my Grandma once gave me. 
I tried various other objects to complete the still life arrangement, and, once I'd settled on these items I realised that the small jug on the left was once my other grandmother's and my Mum gave me the small yellow one at the front of the compostion!

I discovered that it is very difficult to paint shadows on yellow objects without losing the yellow, as a result I don't think this has as much light and dark contrast on the objects as I would have liked to acheive...