PlantPeers
Back to Catalog
No image available
Berberidaceae FAMILY

Mahonia x media

Mahonia x media

Edibility
2/5
Medicinal
2/5

Safety & Hazards

All parts of the plant contain the alkaloid berberine - this is most concentrated in the roots, stems and inner bark, and least concentrated in the fruits. In small quantities berberine has a range of effective medicinal applications but, in excess, can cause vomiting, lowered blood pressure, reduced heart rate, lethargy, and other ill-effects. The fruit of most, if not all, members of this genus are more or less edible and can be eaten in quantity since the levels of berberine in the fruit are very low.

Cultivation Details

HabitEvergreen Shrub
Growth—

The fully dormant plant is hardy to about -15°c[1], though the young growth in spring is more susceptible and can be damaged by temperatures around 0°c. An easily grown shrub, it thrives in any good garden soil including heavy clays. Prefers a semi-shaded woodland position in a damp, slightly acid to neutral humus-rich soil. Survives under very heavy tree shade. Commonly grown as an ornamental plant, there are several named varieties[2]. This plant often produces a good crop of fruit in April and May. It seems that a sheltered position helps to ensure a good crop, as does growing more than one cultivar together and perhaps also one or both of the parents (M. Bealei and M. Japonica)[PFAF]. The cultivars 'Charity' and 'Lionel Fortescue' have both been seen on a number of occasions with heavy crops[PFAF]. The flowers are very sweetly scented[2]. Some Berberis/Mahonia species (especially Berberis vulgaris) harbour the black stem-rust fungus (Puccinia graminis Persoon). This is a major disease of wheat and barley crops and can spread from infected barberries to the grain crop. The sale or transport of susceptible or untested species of Berberis is illegal in the United States and Canada[3]. We have no data on susceptibility for this species[PFAF].

Propagation

Seed - this is a hybrid species and seed will not come true, though some interesting plants might be produced. The seed is best sown as soon as it is ripe in a cold frame[4]. It usually germinates in the spring[PFAF]. 'Green' seed (harvested when the embryo has fully developed but before the seed case has dried) should be sown as soon as it is harvested and germinates within 6 weeks[PFAF]. Stored seed should be sown as soon as possible in late winter or spring. 3 weeks cold stratification will improve its germination, which should take place in 3 - 6 months at 10°c. Prick out the seedlings when they are large enough to handle and grow them on in a cold frame for at least their first winter. Plant them out in late spring or early summer. Division of suckers in spring[4]. Whilst they can be placed direct into their permanent positions, better results are achieved if they are potted up and placed in a frame until established[5]. Leaf cuttings in the autumn. Stems will often root if they are stuck in the ground with most of their leaves removed[2]. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Mahonia+x+media>

Pollinators

Insects

References

  1. [1]Shrubs. — Phillips. R. & Rix. M. · Pan Books · 1989 · ISBN 0-330-30258-2 ↩︎Excellent photographs and a terse description of 1,900 species and cultivars.
  2. [2]Ornamental Shrubs, Climbers and Bamboos. — Thomas. G. S. · Murray · 1992 · ISBN 0-7195-5043-2 ↩︎Contains a wide range of plants with a brief description, mainly of their ornamental value but also usually of cultivation details and varieties.
  3. [3]Flora of N. America — http://flora.huh.harvard.edu/fna/ ↩︎An on-line version of the flora with an excellent description of the plant including a brief mention of plant uses.
  4. [4]Propagation of Trees, Shrubs and Conifers. — Sheat. W. G. · MacMillan and Co · 1948 · ISBN - ↩︎A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
  5. [5]Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. — Bean. W. · Murray · 1981 · ISBN - ↩︎A classic with a wealth of information on the plants, but poor on pictures.
  6. [6]The medicinal uses of the genus Mahonia in traditional Chinese medicine: An ethnopharmacological, phytochemical and — Jian-Ming He, Qing Mu · 2016 · http://dx.doi.org/10.1016/j.jep.2015.09.013 · ISBN 0378-8741 ↩︎A review of the medicinal uses of the genus Mahonia in China.
  7. [7]Medicinal Plants of China — Duke. J. A. and Ayensu. E. S. · Reference Publications, Inc. · 1985 · ISBN 0-917256-20-4 ↩︎Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.
  8. [8]Earth Medicine, Earth Food. — Weiner. M. A. · Ballantine Books · 1980 · ISBN 0-449-90589-6 ↩︎A nice book to read though it is difficult to look up individual plants since the book is divided into separate sections dealing with the different medicinal uses plus a section on edible plants. Common names are used instead of botanical.
  9. [PFAF]Plants for a Future — pfaf.org ↩︎