Sun Drops or Narrow-leaf Evening Primrose (ee-no-THEE-rah: frew-TIH-koh-suh)
Large, very bright yellow, poppy like flowers on 20 inch tall stems. Plants form a mat low growing foliage and in the fall the foliage turns bright red.. Easy to grow, doing well in most soil types. Oenothera fruticosa youngii blooms in late June, July and early August with some re-blooming into fall. Flowering stems reach a height of 12-18 inches and new stems form an attractive ground cover in late summer and fall. Plants do very well even in dry soils, but will wilt when in bloom if the soil is bone dry. The flower buds have a reddish color before the flowers open. A choice day-blooming species. The species name means 'Shrub like'. Over a few years the plants grow into a slowly spreading clump and the plants are easy to divide and transplant into new locations.
Surface sow the seeds, light needed for best germination, use 65 to 75F, germination in 10-30 days.
Limpia Evening Primrose or Kunch Sundrops
Oenothera kunthiana 'Glowing Magenta' is a pretty, small plant with many bright magenta pink (some times white) flowers, blooming through out the summer. Glossy dark green foliage, a morning bloomer with flowers open later in the day on cloudy days and in the fall. Grows 7 to 15 inches tall, plants will flower the first year around 7 inches tall and the next year grow taller. Avoid moist soils.
Zones (5) 6-10
This species is native to south western USA and Mexico, including Texas.
Surface sow the seeds, light needed for best germination, use F60-70, germination in 10-30 days. If no germination move to 32-39F for 6 weeks then back to 65F.
Ozark Sundrops or Missouri Primrose or Glade Lily or Bigfruit Evening Primrose Onagraceae:
Plants are shorter than other yellow species of Oenothera, reaching a height of 7 to 12 inches. The plants produce many 3 to 4 inch wide, yellow colored flowers in early summer with plants blooming from June - September, and some bloom until hard frost. The flowers open up in the evening and are open all night, were they are visited by moths, and close sometime before noon. Stems tend to be some what lax and plants form large spreading clumps that grow to a height of 5 to 8 inches, with a good amount of basal foliage. The foliage has an undulating habit with long elliptic or lanceolate-shaped leaves. Grow in full sun and space plants out about 12inches apart in well- draining soils with a pH between 5.8 - 6.8 Drought tolerant. Best results in nutrient poor soils, nitrogen rich soils will produce plants with a lot of soft foliage a fewer flowers. Mixes well with the shorter growing Catmints and Shasta Daisies, effectively used as a mass planting and used as a ground cover amongst large rocks.
Native to south central United States. Cover seeds, darkness needed for best germination, Seeds germinate in less than 2 to 3 weeks, keep seed in constant moisture (but not wet) with temperatures around 70F. After germination grow out seedlings cooler, with 55 to 60F. working well.
Large, Soft lemon yellow colored flowers produced in June and July on stems that grow fromo 24-36 inches tall. The flowers opens in later in the day and remain open durring the night as the flower age they chang to orange and finaly fading to pink. Plants flower the first year.
Oenothera odorata is native to South America
Thinly cover seeds, darkness needed for best germination, Use F60-70, germination in 10-30 days. If no germination, move to 32-39F for 6 weeks then back to 65F.
Flowering in about eight weeks from sowing and flowering for many months until late autumn. The large, fragrant flowers are white with tints of pink. Plants grow 10 to 18 inches tall. An under ground spreader, used as a type of ground cover in well drained soils. Can be difficult to remove from a mixed border since any small piece of root left behind can grow into a new plant.
Surface sow the seeds, light needed for best germination,use F70, germination in 10-30 days.
Prairie Sundrops Onagraceae:
An attractive species with large bright yellow flowers. It has hairy stems and four-angled fruits. It grows well from seed and under cultivation can grow into large showy colonies. Resembles Oenothera fruticosa but has hairy leaves.
Sow and Thinly cover seeds with soil medium. Use F45-55, germination in 20-50 days. If no germination, move to 32-39F for 8 weeks then back to 55F.
[Oenothera fruticosa ssp. glauca] Sundrops or Primrose or Narrowleaf Evening-Primrose (ee-no-THEE-ruh: tet-ra-GON-uh) Onagraceae:
Long lived perennials with bright sunny Golden-yellow flowers, red tinted flower buds. Blooms early summer. Very showy with 1.5inch (1.5 in = 3.81 cm) wide, bright - almost blinding yellow, cup shaped flowers. Plants are easy to grow and spread-out to form nice dense clumps in a few years, growing about 15 inches (15 in = 38.1 cm) tall. Does very well on sandy loam soils and can take many years of neglect in that out of the way location were you can not water but want some thing with a WOW factor display early in the year and long blooming. Plants spread-out a few inches each year in heavy soils and will spread-out more in porous soils. Best in full sun in well draining soils, Oenothera tetragona will grow in part shade but tends to be floppy then. Produces many flowers per stem, after flowering the stems can be cut off to tidy up the display and plants will then produce low growing rosettes of foliage, that each can be moved and will bloom the next year. Easy from seed, plants will bloom the second year. A good plant for the 'occasional' gardener that does not have a lot of time to tend to or fuss with their plants or landscape.
Native from eastern USA.
Surface sow the seeds, light needed for best germination,use F 70, germination in 10-30 days.
(Also sold under the name 'Sunset Boulevard')
Oenothera versicolor is a short-lived perennial that will bloom the first year with an early spring sowing. Intense orange flowers that fad to a reddish color as they age, produced on striking 16-26 inch tall plants. The 2-inch wide flowers gradually fading to red. Long blooming plants with upright stems. I>Oenothera versicolor blooms in June and July. Grown as annuals further north, and sometimes it acts like a self-seeding annual.
Native from South America.
Surface sow the seeds of Oenothera versicolor, light needed for best germination, use F70 with germination starting in 10 to 30 days.
Prairie Primrose or Hairy Evening Primrose Similar to Oenothera biennis, Oenothera parviflora, and Oenothera oakesiana.
Oenothera villosa grows from 2 to 7 feet tall, the stems are upright and may have a few branches near the top, the first year it produces a clump of basal foliage, and plants bloom the second year. it is more a weed than a showy garden plant, but is attractive in a "wild" flower garden. Flowers late in the day and at night. Native to North America, but imported to Europe and used as a root vegetable. Now naturalized in Japan, Russia (Far East), and widely in S Africa, Asia, Europe, and S South America. They are self pollinating plants that produce a lot of seed, so on open ground they can be prolific.
Surface sow the seeds, light needed for best germination, use 70F, germination in 10-30 days.
Engelman's Prickly Pear or Desert Prickly Pear or Brown Spined Prickly Pear Cactaceae:
Red, yellow, and orange flowering plants produced from this seed. Spring blooming; plants can grow 3 to 4 feet tall and 3 or more feet wide. Nicely used in desert settings and on dry hillsides.
The species is native form Arizona, Utah, Texas. Hardy to 0C (33F). There are about 150 species of Opuntia with many hybrids. The seeds are large and easy to sow.
Oxytropis lambertii has purple colored, bean like flowers on slender stems. It grows 1 to 3 feet tall. Each plant once established has a number of stems, blooming in early to mid summer. Loved by Monarch butterflies. Oxytropis lambertii has deep taproots and once established should not be moved.
It is native to the grasslands of central Canada and the mid-west and Great Plains of the United State
Silky Locoweed or White Locoweed (ok-SEE-troh-pus: ser-ee-KEE-uh) Fabaceae or Papilionaceae:
This species has white or creamy-yellow flowers and sometime plants with lilac colored flowers are produced (lilac colored plants are most likely hybrids between this species and O. lambertii). It is a herbaceous perennial that grows and flowers in early spring, completes flowering and seed production by early summer, and then goes dormant. Oxytropis sericea grows 4 to 12 inches tall.
Oxytropis sericea is native to much of the western half of North America, were it is considered a weed species in pastures because it is poisonous to cattle and horses. It is found in prairies and mountain meadows, and on open mountain slopes.