Green-fingered gardener Mr Bloom welcomes a team of young helpers, who tend to his plants and produce. The Tiddlers and Mr Bloom dig to find worms in the garden and watch some at work in the Compostarium who are busy taking rubbish and turning it into something useful. Inside the Nursery, Margaret dreams of becoming a Space Cabbage so the Tiddlers help by creating star pictures and planets, and the Wee MacGregors take the left-over rubbish to help make Margaret's dream come true.