Hobbies / Books   (Gardening, walking, books, films, theatre etc.)

Yes Ena, the leaves on Daffs shouldn't be cut back for at least 6 weeks after flowering to allow as you say photosynthesis. I've known people to tie up the leaves into a tidy knot... not as bad as cutting the leaves but still restricting the ability of the bulb to form next years flower.
I began my study to become an horticulturist in 1973, when I started with the Council's newly formed landscape section (I was 19 at the time and had to study at evenings and weekends).
Sadly there are so many people today who profess to be 'gardeners' but don't have any idea of the science involved in it.
But I guess it's the same with 'builders' - no legislation to prevent jobbing labourers to set themselves up as a builder, without the basic City and Guilds.
As for horticulture, I regularly see shrubs pruned with hedge cutters and trees hacked back without any thought whatsoever. It does worry me!