ENCYCLOPEDIA OF GARDENING. 
coid frame or greenhouse. Pot, Aug. to Nov., placing one bulb 2in. 
deep in a 5 or Gin. pot. Water very little till growth begins, then 
freely. Withhold water when flowers fade & keep soil quite dry till 
potting time. Propagate by offsets planted & treated as advised for 
large bulbs, Aug. to Nov. 
HALF-HARDY SPECIES: Z, Andersoni, golden yellow, May, 6 in., Monte Video; 
Atamasco (Atamasco Lily), pink, Ma N ica ; i i 
as ele y), pink, May, 1 ft., N. America; carinata, pink, May, 
HARDY SPECIES: Z. candida (Peruvian Swamp Lily), white, Sept., 6 in., Peru 
Zephyr Flower (Zephyranthes candida).—See Zephyranthes. 
Zingiber (Ginger).—Ord. Scitaminacee. Stove perennial. Roots 
furnishing the ginger of commerce. First introduced 16U5. 
CULTURE: Compost, equal parts loam, peat, & sand. Position, 
pots in shady moist part of stove. Pot, Feb. Water copiously, March 
to Oct.; keep nearly dry, Oct. to March. Temp., March to Oct. 73° 
to 85°; Oct. to March 55° to 65°. Stems die down in autumn. Pro- 
pagate by division of the rhizomes in Feb. 
SPECIES CULTIVATED: Z. officinale, red, July, 2 ft., E. Indies. 
Zinnia (Youth-and-old-age).—Ord. Composite. Half-hardy an- 
nuals. First introduced 1770. 
CULTURE: Soil, deep loamy, liberally enriched with decayed 
manure. Position, sunny beds or borders. Sow seeds 1-16 in. deep 
in light soil in temp. 55° early in April. Transplant seedlings when 
third leaf forms 2in. apart in shallow boxes filled with light mould. 
Place box near the glass in temp. 55° until seedlings are established, 
then remove to a cooler house, and if possible plant out 4in. apart 
in good rich soil in cold frame early in May. Shade from sun, keep 
moist, & gradually expose to air, end of month. Plant out 8 to 12in. 
apart second week in June. Sow also outdoors middle of May. Pre- 
pare bed of rich soil in sunny position, sow three or four seeds at 
intervals of 12in., & thin seedlings to one at each place when third 
leaf forms. Mulch all zinnias with decayed manure after planting. 
Water liberally in dry weather. Apply stimulants when the plants 
commence to flower. On dry soils take out mould to depth of 12in., 
ut 3in. of decayed manure in, then replace former. 
SPECIES CULTIVATED: Z. elegans, various colours, summer, 2 ft., Mexico; 
haageana, orange-yellow, summer, 1 ft., Trop. America; multiflora, scarlet, summer, 
2 ft.; tenuiflora, scarlet, summer, 2 ft., Mexico. 
Zizania (Water Rice; Water Oats; Canadian Rice; Indian Rice). 
—Ord. Gramineex. Hardy aquatic perennial grasscs. 
CULTURE.—Soil, ordinary. Position, margins of shallow ponds or 
lakes. Plant, April or May. Propagate by seeds sown in heat in 
spring, growing seedlings on under glass until May, then hardening 
off in cold frame, 
SPECIES CULTIVATED: Z. aquatica, green and brown, summer, 6 ft., N. 
America, 
Zonal-Geranium (Pelargonium zonale).—See Pelargonium. 
Zygadenus.—Ord. Liliacee. Hardy bulbous-rooted plants. 
CULTURE: Soil, peat, leaf-mould, and sand. Position, partially 
shady moist border or bed. Plant, autumn. Lift and replant trienni- 
ally. Propagate by division of offsets in autumn; seeds sown in sandy 
soil in a cold frame in spring. 
SPEUIES CULTIVATED: Z. angustifolins (Syn. H»lonias angus'ifelia’, white 
and purple; June, 18 in., N. America; elegans, green and white, July, 2 ft., N. 
America; Fremontii, cream, June, 18 in., N. America; glaberrima, white, July, 
1 ft., N. America; Muscitoxicum, green, July, 2 ft., N. America; Nuttallii, white, 
June, 18 in., N. America. 
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