This delightful, small, water-wise tree is a must for the home gardener
who wants an attractive evergreen tree. The tree is not messy and
does not have a destructive root system. It is ideal for attracting
nectar-seeking birds during the hot, dry, Western Cape summers.
The trees look spectacular when in full flower next to the drabness
of the surrounding summer vegetation.
Description and Ecology
tree is small in stature (max. height 5 m), evergreen, with rigid
branches and has a gnarled trunk. The flowers are numerous, bright
red to pink in colour and are borne in small clusters during the
months of February to March. They are distributed throughout the
Flowers produce copious amounts of nectar which attract birds,
especially the Lesser Double-collared Sunbird and Malachite Sunbird.
The butterfly Deudorix antalis breeds in the tree.
are followed by attractive, large, lime green to pink seedpods which
turn brown when ripe. The seed is dispersed through an explosive
seedpod, which when dry, catapults the seeds great distances from
the parent plant. Seeds are produced in May and June of each year.
Under normal circumstances the seeds would germinate in moist soil
in late spring after the winter rains.
The trees often occur along the banks of dry streams and small rivers
in the Little Karoo, the drier areas of Eastern Cape and the southern
part of Western Cape.
The genus Schotia was named in honour of Richard van der
Schot, chief gardener of the Imperial Garden at Schönbrun.
The name boerboon was given to certain indigenous seeds that
are edible. The word huil (cry in English) is due to the
nectar that drips or weeps from the flowers.
afra var. afra is in the subfamily Caesalpinioideae. All
the members of this subfamily have pinnately compound, alternate leaves.
Leaflets are more than three terminally. The stipules are present.
This tree can be used as a shade and ornamental tree. The leaves
are browsed by stock. The seeds are edible either green, or mature.
They can be used as a meal if roasted and ground. The bark, if ground
and soaked in water, can be used as tannin. Schotia afra
can be pruned to shape and can be grown as a bonsai specimen.
Growing Schotia afra var. afra
afra var. afra seed is easy to collect. One has only
to look a few metres away from the parent plants to see the masses
of flat, light brown seeds lying on top of the soil.
Use flat plastic or wooden seed pans (seed trays). Sow in a semi-shady
area about 40% shade. Seeds should sown in well-drained, loamy soil.
The general rule for the sowing depth is the same as the thickness
of the seed (about 3-5mm). Sow the seeds in late spring, September
till mid-October. Water well once a day. Make sure the seeds are
not crowded in the pan (this should prevent damping off). The seeds
will swell with moisture and should germinate within 7 days. The
seedlings should be allowed to develop a tap root and be in their
third set of leaves before they are transplanted into planting bags.
If they are given enough water and are planted in a rich, well-drained
soil, they will develop rapidly.
Tips for planting in the home garden: dig a good hole, 1 m wide
by 1 m deep. Use plenty of well-rotted compost and good loam soil
in the hole. Add a handful of agricultural lime, super phosphate
and 2:3:2 to the soil. Mix it all up well. Plant the sapling. Water
well once a week especially if conditions are dry. Stake the tree
to stop wind damage. Under ideal conditions you should be able to
sit under the tree within five years.
Watch for aphids/greenfly attacking the new foliage, especially
in spring. Spray with a recommended approved aphicide, at least
once a week for three weeks to break the insects life cycle, or
use environmentally friendly Sunlight liquid soap, about 10 ml in
5 litres water will suffice. Spray liberally on affected parts.
- Germishuizen, G., Meyer, N.L., Steenkamp, Y. & Keith, M. (eds) 2006. A Checklist of South African plants. Southern African Botanical Diversity Network Report No. 41. SABONET, Pretoria.
- VAN WYK, B. & VAN WYK, P. 1997. Field guide to trees
of southern Africa. Struik, Cape Town.
- DE WINTER, B., DE WINTER, M. & KILLICK, D.J.B. 1966. Sixty-six
Transvaal trees. Government Printers, Pretoria.
Karoo Desert NBG