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This is a hardy, versatile herbaceous perennial, suitable both
for shady subtropical and sunny water-wise gardens.
Description
P.
neochilus is a perennial, aromatic, succulent herb, which grows
up to 500 mm high and 600 mm wide. The deep blue and purple flowers
are borne from September to April. This plectranthus has succulent,
grey-green leaves, which form an attractive ground cover even when
the plant is not in flower. It is reported that in some other parts
of Africa, such as in Namibia, P. neochilus occurs as an
annual.
Distribution
Plants can be found growing naturally in dry thicket, open and sometimes
rocky woodland, from the Eastern Cape, KwaZulu-Natal, Mpumalanga
to Limpopo in South Africa, as well as in Zimbabwe, Zambia and Namibia.
Derivation of name
The
name Plectranthus hails from the Greek word plektron,
a spur, and anthos, a flower and neochilus is derived
from the Latin word chilo, which refers to the (calyx) lips.
Uses and cultural aspects
Although currently not documented, P. neochilus plants
are believed to scare away snakes from human dwellings (perhaps
because of their unpleasant aromatic smell) and other documented
reports indicate that these plants can be used effectively as an
air purifier.
Growing Plectranthus neochilus
Plants perform exceptionally well as ground covers, in warm dry
areas, but can be successfully grown in light shade as well. If
planted in rockeries the results are even better. Stems root easily
and the plant spreads, forming a tidy clump. The plant is often
used in the landscaping of difficult sites. It may look a little
stressed in very dry conditions, but bounces back when it receives
some water.
Like most Plectranthus species, the plant prefers loam to
sandy soil with good drainage and has relatively low water requirements.
This might be attributed to the light coloured foliage (grey-green),
which is often associated with water-wise plants. The leaves reflect
the sun's rays, keeping the plant cool and ultimately reducing transpiration.
Plectranthus neochilus plants are easily propagated from
softwood cuttings, and this is the recommended method. They are
seldom attacked by pests.
References and further reading
- Codd, L.E. 1975. Plectranthus (Labiatae) and allied genera in
southern Africa. Bothalia 11: 371-442.
- Codd, L.E. 1985. Lamiaceae. Flora of southern Africa
28,4: 137-172.
- Hankey, A, Joffe, P. & Turner, S. 1999. Water-wise gardening
for summer rainfall regions. National Botanical Institute
and the Department of Water Affairs and Forestry, Pretoria.
- Pooley, E. 1998. A field guide to wild flowers of KwaZulu-Natal
and the eastern region. Natal Floral Publications Trust, Durban.
- Van Jaarsveld, E. 1987. The Plectranthus handbook. National
Botanic Gardens, Kirstenbosch.
- Van Jaarsveld, E. 1997. Veld gardening in South Africa: the
Valley Bushveld/Noorsveld. Veld & Flora 83: 20-25.
- Van Jaarsveld, E. 1997. Veld gardening in South Africa: the
forest garden. Veld & Flora 83: 51-53.
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Author
Tovhowani Mukoma
Lowveld NBG
June 2004
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