This useful hardy annual adds zingy spring freshness to borders and cut flower arrangements later on in the season. Euphorbia-like, citrus green flowers bloom on tall stems from July to September. The foliage is reminiscent of Eucalyptus, with intriguing stems that appear to grow through the leaf. Versatile and easy to grow, Bupleurum riotundifolium 'Green Gold' makes a superb filler for summer borders. Sow it alongside tall Ageratum, such as 'Timeless' for beautiful cut flowers, or interplanted with wildflowers for a stylish Cottage Garden look. If you like the look then let it set seed in late summer for drifts of fresh seedlings next year. Height: 80cm (31"). Spread: 40cm (16").
Direct sow Bupleurum seed outdoors where they are to grow from March to May or in September for overwintering. Autumn sowings will flower in late spring. Choose a position in full sun on any well drained soil which has been raked to a fine tilth. Sow seeds thinly but do not cover as light will aid germination. Water the ground regularly, especially during dry periods. Germination usually takes 14-30 days. When seedlings are large enough to handle, thin them out to 40cm (16") apart.
Alternatively, sow Bupleurum indoors from March to May at a temperature of 15-29C (59-84F). When seedlings are large enough to handle, transplant and grow them on in cooler conditions until large enough to plant outdoors.
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