Growing Telfairia occidentalis indoors is quite a challenge due to its size, but it's doable with some creativity! It does need plenty of space since it’s a vigorous climbing vine. You can use a sturdy trellis or some wall-mounted hooks and strings to train it upward.
For light, it needs bright, indirect sunlight, ideally near a south or west-facing window. A rich, well-draining soil works best. Keep the soil consistently moist but not waterlogged; check frequently to adjust your watering schedule. Nutrient-wise, regular fertilization every few weeks can help since it’s a heavy feeder.
Overall, you'll need to keep pruning manageable interior growth. This plant is a fantastic source of nutrients, so if you can manage its care indoors, it can be very rewarding!