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Rock Garden Plants A to Z:
BACK
Linum- (Perennial Flax)
Linum arboreum |
The dwarf varieties of Flax are tufted plants with wiry stems which
are easy to grow but are usually short-lived. They produce their flowers
in summer, five petalled and nearly always blue or yellow. The blooms fade
quickly, but there are always more buds to open - the best displays occur
in sandy soil and hot weather. The two enemies of Linum are waterlogged soil
in winter and slugs in spring.
VARIETIES:
L. perennial
alpinum is one of the sky blue varieties - height 6 in., flowering period
June-August. Another blue variety for the rock garden, this time white-centered
blooms, is
L.
narbonense
'Heavenly
Blue' (1 ft.).
L.
arboreum is quite different- it is a woody species with grey-green leaves
and terminal clusters of large golden yellow flowers. Like another yellow
Flax
(L.
flavum) it is only moderately hardy and is sometimes listed as a plant
for the alpine house. The best of the yellow Flaxes is
L. 'Gemmeli's
hybrid'- a 6 in. grey-green mound bearing large
flowers.
SITE
& SOIL:
Well-drained garden soil in full sun.
PROPAGATION:
Sow seeds under glass or plant stem cuttings in a cold frame in
summer.
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