Tips for Growing Thunbergia or Black Eyed Susan Vine
Black eyed susan vine or Thunbergia elata
is one of the easiest
of summer flowering annual vines to grow.
It is ideally suited for hanging basket growth and if fed and watered
properly will quickly fill a 12-inch basket with its arrow-shaped
leaves and small orange toned blooms (with black eyes).
Lots Of Light
This plant thrives in lots of light but nothing fully hot and direct.
The excessive watering created in full hot spots can often lead to root
rot in the container.
I always did well growing them in a dappled shade
container. Full shade will reduce their blooms considerably.
appreciates dampish soil but not water-logged so the best thing to do
is water thoroughly and then let the soil drain - if you can touch the
soil and your finger is damp, do not water. If on the other hand, you
touch the soil and your finger comes away dry, then flood the plant
Feed at least weekly to keep blooms coming. Use a balanced fertilizer
at recommended strengths.
Wilting In Heat
This plant will wilt in extreme heat but it will come back if moved to
a slightly less sunny area. This will happen no matter how wet the soil is.
If the soil is damp and the plant is still wilting do not water. This will lead to rot.
If the plant is wilting all over and does
not come back, it is quite likely you've been overwatering and the
roots are dead.
Or, underwatered and it has died from neglect.
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Germination / Propagation
Black eyed susan vine seed germinates readily when the soil temperature
is kept at 72F.
It does not appreciate transplanting and does best when
sown (one-quarter inch deep) where it is to grow and bloom.
transplant, do not mess about with the roots but try to keep them from
being disturbed in the transplant process.
A new species T grandiflora
is coming onto the market. This
thicker leaf and larger flowered species is propagated from seed and
will be available at better garden shops.
Shopping Resources for this Page
Several suppliers of black-eyed-susan vine seeds can be found here
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