| Life form | Herbaceous |
| Family | Scrophulariaceae |
| Origin | Mexico, Guatemala |
| Ease of cultivation | Medium difficulty |
| The size | In height up to 15-30 cm, in width 15-22 cm. |
| Growth rate | Grows in one season. |
| Lifespan | Perennial. |
| Temperature | It is better to keep the temperature above 60,8 ° F in winter and in summer. It is a thermophilic plant that is well suited for apartments with central heating. |
| Humidity | Requires room humidity of about 50%. However, the tetranema adapts to more to dry air. |
| Lighting | Tetranema needs a bright diffused light, but if the light is too bright the blossoms will start to wither. It can grow in partial shade conditions; the ideal location is the east window. |
| The soil | For this plant, a suitable soil mix based on peat, deciduous earth, sand or perlite is required fertile friable mixture (pH 6-7). You can use the shop-ready substrate for plants. Always use a pot with an opening and drainage. |
| Watering | Watering should be frequent, the soil should be kept slightly damp. At watering it is impossible, that water got on flowers. However, it is also not possible for the water to stagnate in the pan; The excess moisture leads to decay of the roots. If waterlogged or dried, the plant may die. |
| Fertilizer | The fertilizer should have a diluted solution with a high content of phosphorus. It should be added once in 2 weeks from April to September. The application of fertilizer should be less frequent with low lighting and at low temperatures. |
| Reproduction | It is propagated by seeds at a temperature of 68-71,6 ° F. After the appearance of the second leaf, the seedlings are dived into pots with a diameter of 8 cm. Usually the plant blooms in the same year. Often an adult plant forms seeds that grow on their own in a pot next to the mother plant. It can be propagated by cuttings and separation of daughter sockets. |
| Bloom | Blossoms from May to September. It forms lilac, pink-violet, white flowers of tubular form. |
| Transfer | Transplanted in the spring as needed. |
| Features of care | It is necessary to remove faded peduncles and damaged leaves. It is better to buy plants with a small number of blossoming flowers and a lot of buds. |
| Difficulties | The plant is most commonly affected by aphids, which cause the death of the plant. It can also be affected by scabs and mealybugs. |
| Air cleaning | – |
| Toxicity | – |
