The Temperate Database is in the process of being updated, with new records being added and old ones being checked and brought up to date where necessary. This record has not yet been checked and updated.
Common Name: Oak Leaf Datura
Datura quercifolia is an annual plant that can grow up to 1.50 metres tall.
It has edible and medicinal uses.
All members of this genus contain narcotics and are very poisonous, even in small doses[
South-western N. America - Arizona to Mexico.
Roadsides, 1200 - 1800 metres in Arizona.
Prefers a rich light sandy soil[
] and an open sunny position[
]. Grows best in a fertile calcareous soil[
This species is not hardy in the colder areas of the country, it tolerates temperatures down to between -5 and -10°c[
This species is extremely susceptible to the various viruses that afflict the potato family (Solanaceae), it can act as a centre of infection so should not be grown near potatoes or tomatoes[
Closely related to D. stramonium[
Fruit - ground up and mixed with clay[
] ( the clay probably has a neutralizing effect on the toxins). A very toxic plant, its use cannot be recommended. The fruit is about 7cm long and 6cm wide[
A stupefying beverage is made from the leaves and roots[
The whole plant is narcotic[
]. It has been used in the past to deaden pain, treat insomnia etc, but any use of this plant should only be carried out under the supervision of a qualified practitioner since the difference between the medicinal dose and a toxic dose is very small.
Sow the seed in individual pots in early spring in a greenhouse[
]. Put 3 or 4 seeds in each pot and thin if necessary to the best plant. The seed usually germinates in 3 - 6 weeks at 15°c. Plant out in late spring or early summer, after the last expected frosts.
Especially in areas with hot summers, it is worthwhile trying a sowing outdoors in situ in mid to late spring.