Sedum 'Thundercloud'
stonecrop
- Position: full sun
- Soil: moderately fertile, well-drained, neutral to slightly alkaline soil
- Rate of growth: average to fast-growing
- Flowering period: August to September
- Flower colour: pink-flushed white
- Other features: attractive to butterflies and bees;
- Hardiness: fully hardy
In spring each year, fleshy grey-green foliage emerges and forms a perfectly neat dome, which will add structural interest towards the front of the border. As the summer progresses these domes become looser and a mass of small star-shaped flowers emerge, usually lasting well into autumn. A wonderful low-growing perennial that is useful for pots, or for adding late colour to the garden. - Garden care: The flowerheads look great left during the winter to add shape and texture to your border. In February and March cut back the old flowerheads and apply a generous 5-7cm (2-3in) mulch of well-rotted garden compost or manure around the base of the plant. Once established, sedums can have a tendency to flop leaving an open and unsightly centre, especially in fertile soil. One technique to help prevent this is the 'Chelsea chop'. During the last week of May (Chelsea Flower Show week), cut one in every three stems back to the ground. This will produce plants that are less lush and flower slightly later.
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