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Yucca glauca - Nutt.

Common Name Soapweed, Soapweed yucca, Gurney's yucca, American Vetch, Yucca, Narrowleaf Yucca, Soapweed
Family Agavaceae
USDA hardiness 4-10
Known Hazards The roots contain saponins[222]. Whilst saponins are quite toxic to people, they are poorly absorbed by the body and so tend to pass straight through. They are also destroyed by prolonged heat, such as slow baking in an oven. Saponins are found in many common foods such as beans[K]. Saponins are much more toxic to some creatures, such as fish, and hunting tribes have traditionally put large quantities of them in streams, lakes etc in order to stupefy or kill the fish[K].
Habitats Dry plains and sandy hills[43].
Range Central N. America - Iowa to Texas and N. Dakota.
Edibility Rating    (2 of 5)
Other Uses    (2 of 5)
Weed Potential Yes
Medicinal Rating    (2 of 5)
Care (info)
Fully Hardy Well drained soil Moist Soil Semi-shade Full sun
Yucca glauca Soapweed, Soapweed yucca, Gurney


commons.wikimedia.org/wiki/User:SEWilco
Yucca glauca Soapweed, Soapweed yucca, Gurney
commons.wikimedia.org/wiki/User:Annelis

 

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Summary

Bloom Color: White. Main Bloom Time: Late summer, Mid summer. Form: Upright or erect.


Physical Characteristics

 icon of manicon of shrub
Yucca glauca is an evergreen Shrub growing to 1.5 m (5ft) by 0.5 m (1ft 8in) at a slow rate.
See above for USDA hardiness. It is hardy to UK zone 4. It is in leaf all year, in flower from July to August. The species is hermaphrodite (has both male and female organs) and is pollinated by Hand.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers dry or moist soil and can tolerate drought. The plant can tolerates strong winds but not maritime exposure.

UK Hardiness Map US Hardiness Map

Synonyms

Y. angustifolia.

Habitats

 Cultivated Beds;

Edible Uses

Edible Parts: Flowers  Fruit  Leaves  Seedpod  Stem
Edible Uses:

Fruit - raw or cooked[2, 46, 61, 161, 257]. Dry, with a bitter skin[85]. The fruit can be baked and either eaten immediately or formed into cakes and dried for later use[257]. The raw fruit can be dried for winter use[1, 257]. The immature fruits are peeled, boiled and served with seasonings[183]. The soaked, cooked fruit can be made into a syrup and used like hot chocolate[257]. The fruit is up to 8cm long and 12mm wide[2]. Flowers and flower buds - raw or cooked[61, 85]. Delicious raw, they can also be dried, crushed and used as a flavouring[164]. A delicious addition to the salad bowl, or used as a potherb[183]. Flowering stem - raw or cooked[62, 85, 161, 257]. It can be cooked and used like asparagus[164]. The white inner portion of the stem is eaten[183]. Seedpods - cooked. They can be boiled or roasted and used as a vegetable[257]. The plant crowns have been roasted and eaten in times of food shortage[257].

References   More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
Antidandruff  Contraceptive  Oxytoxic  Poultice  Skin

A soap made from the crushed roots is said to be an effective treatment for dandruff and skin irritations[213, 222]. A cold infusion of the root has been used to expedite the delivery of a child or the placenta[257]. The root is poulticed and applied to inflammations, wounds, bleeding cuts, sprains etc[222, 257]. The rotten root can be crushed and boiled to make suds. Drinking these suds is said to induce the menopause in women, thereby rendering then infertile[257].

References   More on Medicinal Uses

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Other Uses

Basketry  Broom  Brush  Fibre  Hair  Needles  Soap  String  Weaving

Both the leaves, and a fibre obtained from the leaves, can be used for making cloth, ropes and mats[21, 57, 61, 82, 85, 169, 257]. The leaves can be split and used to make baskets[257]. The leaves are used as paint brushes and brooms[46, 85, 92]. The leaves can be split and used as a temporary tying material[257]. The sharp points of the leaves have been used as needles[257]. The roots are rich in saponins and can be used as a soap substitute[82, 85, 95]. The soap obtained from the root makes a good hair shampoo[95], it is said to be effective against dandruff and also to act as a tonic to stop the hair falling out[213, 257]. The shampoo also rids the body of lice and other parasites[257].

Special Uses

Scented Plants

References   More on Other Uses

Cultivation details

Landscape Uses:Border, Erosion control, Massing, Rock garden, Seashore, Specimen. Thrives in most soils but prefers a sandy loam and full exposure to the south[11]. Dislikes chalky or peaty soils[111]. Can succeed in light shade[K]. Plants are hardier when grown on poor sandy soils[200]. Prefers a hot dry position and a poor soil[166]. Established plants are very drought tolerant[200]. Hardy to at least -30°c according to one report[164], whilst another one says that it is hardy to about -15°c[200]. A very ornamental plant[1], it rarely flowers unless in a dry sandy soil[42]. The scent of the flowers is most pronounced at night[245]. In the plants native environment, its flowers can only be pollinated by a certain species of moth. This moth cannot live in Britain and, if fruit and seed is required, hand pollination is necessary. This can be quite easily and successfully done using something like a small paint brush[1]. Individual crowns are monocarpic, dying after flowering[233]. However, the crown will usually produce a number of sideshoots before it dies and these will grow on to flower in later years[233]. Plants in this genus are notably resistant to honey fungus[200]. Members of this genus seem to be immune to the predations of rabbits[233]. Special Features:Attractive foliage, North American native.

References   Carbon Farming Information and Carbon Sequestration Information

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Propagation

Seed - sow spring in a greenhouse. Pre-soaking the seed for 24 hours in warm water may reduce the germination time. It usually germinates within 1 - 12 months if kept at a temperature of 20°c. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in the greenhouse or cold frame for at least their first two winters. Plant them out into their permanent positions in early summer and consider giving them some winter protection for at least their first winter outdoors - a simple pane of glass is usually sufficient[K]. Seed is not produced in Britain unless the flowers are hand pollinated. Root cuttings in late winter or early spring. Lift in April/May and remove small buds from base of stem and rhizomes. Dip in dry wood ashes to stop any bleeding and plant in a sandy soil in pots in a greenhouse until established[78]. Division of suckers in late spring. Larger divisions can be planted out direct into their permanent positions. We have found that it is best to pot up smaller divisions and grow them on in light shade in a greenhouse or cold frame until they are growing away well. Plant them out in the following spring.

Other Names

If available other names are mentioned here

Native Plant Search

Search over 900 plants ideal for food forests and permaculture gardens. Filter to search native plants to your area. The plants selected are the plants in our book 'Plants For Your Food Forest: 500 Plants for Temperate Food Forests and Permaculture Gardens, as well as plants chosen for our forthcoming related books for Tropical/Hot Wet Climates and Mediterranean/Hot Dry Climates. Native Plant Search

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

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Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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Expert comment

Author

Nutt.

Botanical References

1160200

Links / References

For a list of references used on this page please go here

Readers comment

Ruth Anne Smithson   Sun Jul 22 2007

The page is highly informative...but didn't answer my question. My yucca won't flower. It's planted in sandy well drained soil, lots of sun, seems perfectly healthy, but won't bring forth a flower. It was given to me by a friend about 4 years ago. This friend has now passed away and I would love this plant to flower in her memory. Any sugguestions?

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