Frostweed, Longbranch frostweed

Helianthemum canadense

Physical Characteristics

Helianthemum canadense is a PERENNIAL growing to 0.4 m (1ft 4in). See above for USDA hardiness. It is hardy to UK zone 7. It is in flower from May to July. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects, cleistogamy. Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils and can grow in very alkaline soils. It cannot grow in the shade. It prefers dry or moist soil.

Distribution

Eastern N. America - Maine to Ontario and Wisconsin, south to North Carolina and Mississippi.

Habitats

Woodland Garden Sunny Edge;

Edible Uses

None known

Medicinal Uses

Alterative Antiscrophulatic Astringent Cancer Tonic The dried leaves are alterative, antiscrofulatic, astringent and tonic[4, 21, 46, 207]. A tea made from the leaves is used in the treatment of kidney ailments and sore throats[222, 257]. A strong leaf tea has been used in the treatment of scrofula[222]. It is applied externally to skin diseases and eye infections[222]. It is said that an oil helpful in the treatment of cancer has been obtained from the plant[4]. Some caution is advised since an overdose can cause nausea and vomiting[4].

Known Hazards

None known