Yes, I agree with Jerry Worrell.  Trees are a major nectar source.  Here in
Sheffield there are many streets lined with Lime trees.  A friend of mine
regularly got a full super per colony in just one week from this source
last year.  Suburban gardens with apple, pear and soft fruit such as
blackberry give also very strong flows.  Lets hear it for the city
beekeepers!
 
Max
 
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Max Westby
(Among other things a Sheffield Beekeeper)
South Yorkshire Beekeepers Association  BBKA apiary reg: JQ34
Phone (Home):          +44 (0)114 236 1038
Fax:                   +44 (0)114 276 6515
e-mail:                [log in to unmask]
World Wide Web Site:   http://www2.shef.ac.uk/default.html
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