130 PLANT PROPAGATION 
our ancestors, is easily raised by sowing seed in a sunny 
position outdoors in April. 
HELENIUM.—Increase these herbaceous perennial and 
annual border plants by seed sown in April and by 
division of the roots in autumn or spring. 
HELIANTHEMUM (SuN Rose).—Propagate these sun- 
loving plants by seed sown outdoors in April and by 
cuttings of young shoots inserted in pots of sandy soil 
placed in a cold frame with shade from sun in August. 
HELIANTHUS (SUNFLOWER).—Increase the annual sorts 
by seed sown outdoors in March or April, and the 
perennial kinds by division of roots in October or 
March. 
HELICHRYSUM.—The  half-hardy annual _ varieties 
grown for border display and for cut everlasting flowers 
are raised from seed sown indoors in gentle heat in 
March for transplanting outside in warm weather in 
April or May. 
Hericonra.—These fine foliage plants are increased 
by division and by cutting off pieces of the rhizomes at 
the time of repotting when growth is just about to start 
in spring. | 
Heriotrropium (CHERRY PrEe).—The named varieties 
usually cultivated are propagated from cuttings 2 inches 
or 3 inches long, which are obtainable in tolerable 
abundance from old plants placed in heat in early spring. 
These root readily in a close frame with gentle bottom 
heat. Young flowerless shoots from border plants may 
be struck in the same way in August to grow on 
through the winter with single stems, pinching out any 
side-growths to form standards for the following season. 
Seed sown in warmth early will supply plants that with 
liberal treatment will flower the same season. 
