Flowers attracting butterflies grew up only when watered regularly.
Only sunflower seeds did not need any after care. Next spring we will cooperate with our town hall to select suitable places and inform the gardeners, so they can water the butterfly fields.
Parks in our neigbourhood are cleaned up 3 times per week by the town hall. Volunteers can support this service and pick up garbage into a small plastic bag when walking through the park.