Perennials & Biennials
- A perennial plant is one that lives for 3 or more years.
- A biennial plant is one that lives for 12 months but requires a winter period to induce flowering; flowering is typically in the spring when it is still too cold to plant out tender annuals.
- An annual plant flowers and seeds within the same year. Tender annuals cannot be planted out until risk of frost is over.
A mixture of all these plant types gives a garden both change and continuity.
Perennials give a garden its character. Trees and shrubs form a framework to build around. Annuals and biennials provide seasonal colour, but must be renewed each year. Perennials provide colour and a variety of form that will last for several years, and are less labour intensive than beds of annual plantings.