GLADIOLUS
339
compact at 1 ft. high and wide, with bright orange-red fl owers. ‘Cooky’ and ‘Werner Arends’ are also compact, both with blooms of bright orange. ‘Red Wings’, to 28 in. high and broad, has semidouble scarlet fl owers. G. ‘Starker’s Magnifi cum’.
To 11⁄2 ft. high and wide, with double fl owers in tangerine orange over a long season. G. trifl orum. PRAIRIE
SMOKE, OLD MAN’S WHISKERS. Zones 1–3. From North America. Foot-wide leafy mound produces stems to 20 in. high, each bear- ing clusters of nodding maroon fl owers. Seeds have long, feath- ery gray “tails.”
Gilia
Polemoniaceae ANNUALS
ZZONES 1–24 FFULL SUN NDLITTLE TO MODERATE WATER
b ATTRACT BUTTERFLIES, BEES
G. tricolor. BIRD’S EYES. Native to California. Grows to 4–18 in. high, about 9 in. wide. Subtly beautiful fl owers, carried singly or in clusters, are 1⁄2 in. wide or wider, with pale to deep violet with yellow throat spotted purple; blue pollen.
Ginkgo biloba MAIDENHAIR TREE
Ginkgoaceae DECIDUOUS TREE
ZZONES A3; 1–10, 12, 14–24 FFULL SUN DO MODERATE TO REGULAR WATER
ill-smelling fruit in quantity. The following recommended varie- ties are male. ‘Autumn Gold’ is an upright grower to 45 ft., eventually spreading to about 35 ft. ‘Golden Colonnade’ is rather narrow, at 45 ft. tall and 25 ft. wide. ‘Presidential Gold’ is broadly oval, reaching 50 ft. tall and 40 ft. wide. ‘Princeton Sentry’ forms a narrow pyramid 50 ft. tall and just 15–20 ft. wide. ‘Saratoga’ resembles ‘Autumn Gold’, with a distinct central leader.
CARE
Plant in deep, loose, well- drained soil. Be sure nursery plants are not rootbound. Water young trees regularly until they reach about 20 ft. tall, then cut back to occasional irrigation. On young trees, cut back any awkward branches and vertical shoots growing parallel to cen- tral leader. Older trees need minimal pruning; just remove weak, broken, or dead branches.
Gladiolus
Iridaceae PERENNIALS FROM CORMS
Ginkgo biloba Gilia capitata
Easy-to-grow Western natives with fi nely cut leaves and fl ow- ers in shades of blue from late spring to early fall. In fall or early spring, sow seeds in well- drained soil where plants are to grow. Thin seedlings to avoid crowding. Fine companions for California poppy (Eschscholzia californica). For plants formerly known as G. aggregata and G. rubra, see Ipomopsis. G. capitata. BLUE THIMBLE
FLOWER, GLOBE GILIA. Native from British Columbia to Califor- nia. Grows 6–24 in. high, about 9 in. wide. Pale violet-blue to blue fl owers with blue pollen are carried in dense clusters that look like pincushions.
Ancient survivor from prehistoric times, when it grew worldwide; now believed to be native to only two small areas in China. Graceful tree, attractive in any season, especially in fall when leathery light green leaves of spring and summer suddenly turn golden yellow. Leaves hang on for a time, then drop quickly and cleanly to make a golden carpet where they fall. Related to conifers but differs in having broad (up to 4 in. wide), fan- shaped leaves rather than needlelike foliage. In shape and veining, leaves resemble leafl ets of maidenhair fern, hence the tree’s common name. Can grow to 70–100 ft. tall, but most mature trees top out at 35–50 ft. Good tree for street or lawn. Extremely long-lived and not usually bothered by insects or diseases. Very tolerant of air pollution, heat, and acid or alka- line conditions. Resistant to oak root fungus. Plant male trees (grafted or grown from cut- tings of male plants); female trees produce messy, fl eshy,
ZZONES 4–9, 12–24; H1; EXCEPT AS NOTED; OR DIG AND STORE
FFULL SUN
O REGULAR WATER DURING GROWTH AND BLOOM
b ATTRACT HUMMINGBIRDS
How to Grow Gladiolus
PLANTING TIME Plant corms of baby gladiolus in fall or early spring for fl owers in late spring. Plant all others from mid- winter (in mildest regions) into spring, after soil has warmed. Grandifl ora hybrids will fl ower about 100 days after planting; the smaller hybrids and species will bloom in about 80 days. Ideal planting times are from January through March in Zones 7–9, 14–24, H1; April through June in Zones 4–6; and November through Jan- uary in Zones 12, 13.
PLANTING Shop for corms that are high crowned for their width; broad, fl at ones are older and less vigor- ous. Plant in rich, sandy loam. Set corms about four times deeper than their height, somewhat more shallowly in heavier soils. Space big corms 6 in. apart, smaller ones 4 in. apart. You can cut fl ower spikes when lowest buds begin to open, but keep at least four leaves on plants to build up corms.
Gladiolus × hortulanus ‘Mon Amour’
Gladiolus is Latin for “small sword,” a reference to the leaf shape of plants in this genus that are grown for their colorful blooms. Tubular, often fl aring or ruffl ed fl owers in an extremely wide color range line a slender
POST-BLOOM CARE After blossoms fade, trim off stems beneath lowest fl ower—uncut stems will set seeds, diverting energy from food storage. Corms can be left in the ground from year to year where plants are perennial (dig, divide, and replant when performance declines). Grandifl ora hybrids are usu- ally dug and stored yearly even in mild-winter regions. In colder areas, dig after foliage yellows completely (in rainy areas, dig while leaves are still green to avoid botrytis infection). Dry corms on a fl at surface in a dark, dry area for 2 to 3 weeks; then store over winter in a single layer in fl ats or ventilated trays in a cool place (40°F to 50°F/ 4°C to 10°C).
G
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