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Ericaceae FAMILY

Gaultheria insana

Gaultheria insana

Edibility
1/5
Medicinal
1/5

Safety & Hazards

The leaves, fruits and the nectar from the flowers contain the toxin andromedotoxin. When consumed in quantity they can cause a sensation of drunkenness, together with watering of the mouth, eyes, and nose; a sensation of cold; abdominal pain; tingling of the skin; convulsions; and paralysis. They can be fatal[1].

Cultivation Details

HabitEvergreen Shrub
Growth—

Gaultheria insana is slightly tender in Britain and does not succeed in the colder parts of the country[2]. Prefers a cool moist but not boggy humus rich soil in sun or semi-shade[2, 3]. A peat and moisture loving species, it requires a lime-free soil[2, 3]. Prefers full sun but tolerates light shade[2, 3]. Plants in this genus are notably resistant to honey fungus[3].

Propagation

The seed requires a period of cold stratification. Pre-chill for 4 - 10 weeks and then surface sow in a lime-free compost in a shady part of the greenhouse and keep the compost moist[4]. The seed usually germinates well, usually within 1 - 2 months at 20°c, but the seedlings are liable to damp off. It is important to water them with care and to ensure that they get plenty of ventilation. Watering them with a garlic infusion can also help to prevent damping of[PFAF]. Prick out the seedlings into individual pots when they are about 25mm tall and grow them on in light shade in the greenhouse for at least their first winter[PFAF]. Plant them out in late spring or early summer. The seedlings are susceptible to spring frosts so might need some protection for their first few years outdoors. The leaves remain very small for the first few years[2]. Cuttings of half-ripe wood 3 - 6cm long, mid summer in a frame in a shady position. They form roots in late summer or spring[4]. A good percentage usually take. Division in spring just before new growth begins[3]. Larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring. Layering. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Gaultheria+insana>

Pollinators

Data unavailable

References

  1. [1]Poisonous Plants of North Carolina — http://www.ces.ncsu.edu/depts/hort/consumer/poison/poison.htm ↩︎An excellent concise but comprehensive guide to toxic plants that grow in N. Carolina. It lists even those plants that are of very low toxicity, including several well-known food plants such as carrots and potatoes.
  2. [2]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.
  3. [3]The New RHS Dictionary of Gardening. 1992. — Huxley. A. · MacMillan Press · 1992 · ISBN 0-333-47494-5 ↩︎Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
  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]Narcotic Plants — Emboden. W. · Studio Vista · 1979 · ISBN 0-289-70864-8 ↩︎A lot of details about the history, chemistry and use of narcotic plants, including hallucinogens, stimulants, inebriants and hypnotics.
  6. [PFAF]Plants for a Future — pfaf.org ↩︎