Categories David Yellow rattle, Springvale Park Post author By David Post date 11 July 2014 Yellow rattle is encouraged in the areas of Wolverhampton’s parks and open spaces which are managed as wildflower meadows. It parasitises the most vigorous plants (grasses and clovers IIRC) and so allows rarer flowers to grow. ← Brewood church from across fields → Meadowsweet buds and flowers