Extra sessions at Kestrel Park, the university and Old Quay are being added as the regional blood service tries to build up stocks ahead of the colder months.
More than 600 residents of Holloway and two neighbouring villages have bought shares in a single community-owned turbine, with stakes starting at €250 and profits promised to stay in the valley.
Crews from 41 clubs raced over two days on the stretch between Millbrook and the city, making this year's anniversary regatta the largest in its history.
A shared online platform run by the growers' cooperative has matched more than 80 farms with regional mills on fixed-price deals, offering both sides shelter from swings in the commodity market.
Motion-sensing LED lamps fitted in Netherby and Bramley Cross use 70 per cent less electricity, and residents in the trial streets say they barely noticed the change.