CHE REFERENCE LIBRARY - Pole Shift Survival Information

THE
NURSERY-LIST
339
Iochroma. So~nrmcece.
Seeds and cuttings as for cestrurn.
Ipomea (Moonflower. &Iorning-Glory) . Conuolu24lacea?.
All the annual species (or those grown as annuals) are raised
from seeds. Seeds of moonflowers and similar species sh.ould
usually be filed or cut on the point, and started in a rather high
temperature. The perennials are also increased by seedage, but
the), inuy be raised from cuttings struck in a forcing-house or a
frame. The moonflowers often do better in the North from cuttings
than from seeds ; this is true also of some of the greenhouse species
that do not produce seeds. Some kinds root with difficulty from
cuttings, howcv~, and they may be propagated by grafting cions
of well-ripened wood of roots on I. yanduratn or ot,her species.
IX\Gion is sometimes eniployed. I. ymduratn can be propagated
1,) root-cuttings ; also grafted. See Calonyction, Quanzoclit,
S rcwf Potato.
Iresine, Achyranthes. A ma~al~.ffz,ucc~.
Increast4 readily tjy cuttings. For summer bedding in the
h’orth, cuttings should be started in February or March; for use
as window plants, the>7 should be taken in late summer. Old
plants Inay be carried over winter to provide a supply of cuttings,
or plants may be grown for this purpose from cuttings struck in
late summer. Rarely propagated by seeds.
Iridacee. Irids.
The rhizomatous irids are easil!r increased by offsets or division.
The species a~1 \~aric~tit~s of crocus and gladiolus are readily propagated
by offstAts. Tht* species of irids produce seed freely and
are rapidly iucreasetl from these. These seeds should be sown as
soon as ripe ; if carried over until spring the germination is much
slower.
Iris. Iriductw.
Seeds grow readily and give good results, and are usually produced
freely, esptGally in the bulbous species. Sow as soon as
ripe in light soil in soin~~ protected place. The bulbous species
produce tmlbels, which may be used for multiplication. The
rhizornatous speck&s are propagattad by dividing the rhizome into
short-rooted pieces ; or when the rhizomes lie on the surface of the
ground and do not root readily, they may be layered. See hidacts.