Sinningia

Sinningia key facts

Growing Difficulty

Intermediate

Light & Placement

Grow in bright partial shade to sun. Planting with the tuber exposed above the soil reduces rot and shows off its distinctive form.

Watering

Water on the leaves or growing point causes rot, so water the soil at the base. In growth water when the soil dries; during dormancy water sparingly.

Temperature & Overwintering

In the cold of winter the top growth dies back and the plant rests. Keep it indoors so the tuber does not freeze and water sparingly.

Soil & Repotting

Use a fast-draining mix and plant with the top of the tuber above the soil to prevent rot. The best time to repot is spring, as dormancy ends.

Dormancy Care

Once the top growth dies back, reduce water and let it rest on the dry side. When new shoots emerge from the top of the tuber in spring, gradually resume watering.

About Sinningia

Listings for the genus Sinningia. Sinningia is a gesneriad genus in which most species form a tuber, a swollen stem at or below the soil surface, and many are grown as caudex plants with the tuber displayed above the pot. The tubular to bell-shaped flowers come in red, orange, pink, purple, white and more, depending on the species. Most species grow from spring to summer and are kept dry and dormant as a tuber once the top growth dies back, but the timing of dormancy and cold tolerance differ between species. See the individual species pages, such as Brazilian edelweiss (Sinningia leucotricha), for species-specific details.

7 things to know before growing Sinningia

1. 1Dormancy Varies by Species

   Most Sinningia grow from spring to summer and die back to the tuber in autumn and winter, but the timing varies with the species and the condition of the plant. If the top growth dies back and the tuber is still firm, the plant is simply resting; reduce watering and let it sleep.

2. 2Caudex Care and Repotting

   The swollen tuber is the centerpiece of the plant and grows more impressive each year. Repot as the plant comes out of dormancy and new shoots begin to move, handling the roots gently. A pot only slightly larger than the tuber helps prevent root rot.

3. 3Water Sparingly by Nature

   Even in the growing season, let the soil dry before watering and keep the plant on the dry side. Excess moisture is the leading cause of tuber rot, so never leave water in the saucer. During dormancy withhold water almost entirely, giving only a little if the tuber starts to shrivel badly.

4. 4Grow in Bright Light

   Most species like bright light; without it they stretch and flower poorly. Indoors, use a bright window or a grow light. Some species scorch in strong midsummer sun, however, so adjust shading to suit the species.

5. 5Flowering Depends on Caudex Size

   Seedlings do not flower until the tuber has grown to a reasonable size. The time to first flower depends on the species, and species that build large tubers take longer. The flowering season also varies, but in most species it falls in the spring-to-summer growing season.

6. 6Prioritize Fast-Draining Soil

   Mix commercial succulent soil with pumice, kanuma, or perlite to make a free-draining blend with plenty of inorganic material. Standard flower potting soil retains too much moisture and should always be amended. A fast-draining mix dramatically reduces the risk of caudex rot.

7. 7Propagate by Seed or Division

   If seed sets after flowering, you can raise seedlings. The seed is extremely fine and is usually germinated by bottom-watering. Large tubers can also be divided, but let the cut surfaces dry thoroughly before planting to prevent rot.

Frequently asked questions about Sinningia

Q.All the leaves died back—is the plant okay?

A.Most Sinningia die back to the tuber to rest, so leaves dying at the end of the growing season is normal. If the tuber is firm, the plant is alive. Keep it on the dry side and new shoots will emerge from the top of the tuber when dormancy ends.

Q.How do I get it to flower?

A.Give plenty of light in the growing season and keep the plant properly dry during dormancy. Low light or constantly wet soil discourages flower buds. Once the tuber reaches a good size, meeting these conditions should bring flowers every year.

Q.Can it be grown entirely indoors?

A.Indoor cultivation is possible, but it needs a bright window or a full-spectrum grow light. Low-light conditions cause leggy growth and poor flowering. Some species scorch in strong midsummer sun, so adjust shading to suit the species. Moving the plant to a bright outdoor spot during the growing season significantly improves plant vigor.

Q.Why is the caudex becoming soft?

A.A soft caudex usually indicates rot caused by overwatering or poor drainage. Inspect the affected area, cut away any rotted tissue with a clean knife, allow the wound to dry out completely, and repot in fresh, fast-draining mix. Mild cases can often be saved with prompt action.

Q.How many years from seed to first flower?

A.It depends on the species: species that build large tubers take longer to flower. If you want flowers sooner, choose a plant with a well-developed tuber.

Handy Growing Tools for Sinningia

Learn more about Sinningia in the encyclopedia

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