I think some grass area should have wild flowers and spring bulbs planted, being cuts only once a year WITH THE GRASS CLIPPING REMOVES, so as to promote wild flowers like you get on hay meadow. If the clipping are not removed, the wild flowers will not increase.
In parks etc, I think there should be wide “paths” cut every 14 days into the “wild” areas, so as to provide good access for walking etc. Clearly some areas need to be cut so children can play ball games etc.
For road verges, the verge near junctions should be cut often so as to maintain good sight lines, with the rest of the verges being managed so as to promote wild flowers and spring bulbs. Funding should be provided for resident groups to plant bulbs and wild flowers in the verges using the buying power of the cancel to get a very good deal.
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Cutter grass every 30 days instead of 14 will make it look a mess, but managing the land correctly to maximise wild flowers would give a better result and be cheaper. However the once yearly cutting and removal of the cut grass would have to be contacted out to farmers, as it needs to be all done in a few weeks to fit in with the life cycle of the wild flowers.