All about growing Sweet Peas from seed

Growing Guide

Sweet Pea seeds can be sown outdoors in September and April in their intended flowering site 2cm deep. Pinch out the growing points of each stem once the second pair of leaves has opened to encourage bushier growth.

In October and November and January through to March Later sow Sweet Peas in 9cm pots, with 5 seeds in each. Place in a propagator or seal container inside a plastic bag germination. Once germinated, grow sweet peas on in cooler conditions, before transferring to a cold frame for overwintering. Pinch out the growing points of each stem once the second pair of leaves has opened to encourage bushier growth.

In spring, plant out sweet peas at a distance of 25cm apart in any well drained garden soil in full sun. Train the stems onto a suitable support such as trellis or a free standing climbing frame.

  • Key Information

    Height: to 180cm

    Spread: to 30cm

    Half-hardy annual

    Sun or semi-shade

    Germination: 10 - 21 days

  • Sowing & Growing Schedule

    Sow Indoors: January to March, or October to November

    Sow Outdoors: April or September

    Plant Out: April to May

    Blooms: June to September

  • Varieties we recommend

    Everlasting, Newland Pink

    Matacuna

    Collie Flowers Mix

    Beaujolais

Top Tip

Feed and water sweet peas regularly throughout the growing season. When growing sweet peas it is essential to cut the flower stems frequently and deadhead faded blooms to prevent seedpods developing. This will encourage more blooms to be produced and extend the flowering period throughout summer.

Caution: Sweet Pea seeds are harmful if eaten.