Streptocarpus saxorum — a medium houseplant, prefers partial sun light
SPECIMEN · FROM THE LIBRARY
Streptocarpus saxorum

Streptocarpus Saxorum

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ON THIS PLANT

Streptocarpus saxorum is a flowering plant in the Gesneriaceae family, native to the eastern regions of South Africa. Commonly known as Cape primrose or rock streptocarpus, this plant typically grows up to 30 cm tall. It features a dark green, glossy rosette of leaves with a slightly hairy texture.

The trumpet-shaped flowers of Streptocarpus saxorum have five petals that can range in color from white to pink or purple. These blooms appear from late winter through early summer and can last for several weeks.

Streptocarpus saxorum thrives in well-draining soil with moderate moisture levels and prefers partial shade or filtered sunlight. It can be grown both indoors and outdoors in mild climates.

This plant has become popular among gardeners due to its attractive foliage and colorful blooms, making it an excellent choice for adding vibrancy to any garden or indoor space. Additionally, it requires minimal maintenance, making it perfect for novice gardeners seeking low-maintenance plants with stunning flowers.

A note from PlantMom

False african violet is fairly resistant to disease and typically does not suffer from many ailments. Still, it can be affected by pests and diseases present in its environment. Such infections are generally mild. For care, the plant requires moderate maintenance. It should be pruned regularly to keep a neat appearance and support healthy growth. Fertilizing can also help encourage flowering. False african violet is well suited to anyone with outdoor space, like a garden or patio, and does not need extensive care experience. It may need more attention when grown indoors.

— PlantMom
CARE GUIDE

How to keep Streptocarpus Saxorum.

Light

The False African violet benefits from sunlight but not in large amounts; it prefers conditions where the sun is gentler. This fondness for light is a characteristic inherited from its native habitat. Excessive exposure can harm its delicate leaves, while too little sunlight can hinder its growth.

Water

The False African Violet flourishes in humid tropical climates, needing consistent moisture and humidity. While it can withstand moderate drought, it should be watered twice a week to preserve its lush foliage. When grown indoors, ensure the soil remains lightly moist without becoming waterlogged, especially during the active growing season.

Temperature

In its native habitat, the false african violet usually grows where temperatures range from 59 to 86℉ (15 to 30 ℃). However, it prefers temperatures between 68 to 100 ℉ (20 to 38℃). In summer, place the plant in a cooler spot away from direct sunlight, and in winter keep it in a warmer location with indirect sunlight.

Fertilizer

The false African violet needs the most fertilizer during its active growth phase, which takes place mainly in spring, summer, and early fall. Fertilization supplies essential nutrients that the soil may lack, encouraging healthy root and stem growth and enhancing the attractive foliage that is a defining trait of this plant.

Pruning

The False African Violet is known for its attractive, velvety leaves and delicate flowers. To promote growth and encourage blooming, prune the plant in early to mid-spring. This involves trimming any dead or yellowing leaves and snipping off faded flowers. Regular pruning not only enhances the plant's appearance but also improves air circulation and light penetration, contributing to its overall vitality.

Pot & Repot

When repotting a false African violet, select a pot 1–2 inches (2.5–5.1 cm) larger with ample drainage. Use a well-draining potting mix. Repot in spring or fall, making sure the root ball sits slightly below the rim of the flower pot. Water thoroughly after repotting and place it in a warm spot with indirect sunlight.

CHARACTERISTICS

Botanical profile.

Plant Type
Herb
Life Cycle
Perennial
Genus
Streptocarpus
Family
Gesneriaceae
Hardiness Zone
10-11
Mature Height
15 cm
Mature Spread
25 cm
Leaf Color
Green
Leaf Type
Evergreen
Flower Color
Purple
Flower Size
3.05 cm
Bloom Time
All year round
Planting Time
Spring
Harvest Time
All year round
Native Area
Kenya, Tanzania
ALSO KNOWN AS

Other names.

en False African-violet en Cape primrose en Nodding violet
FREQUENTLY ASKED

Reader questions.

How should I water my False african violet plant?

To properly water the False African Violet, it is recommended to use filtered water at room temperature. Tap water may have harmful particles, so filtering it is better for the plant's health. The water should be at room temperature or slightly warm because the False African Violet is used to a warm environment, and cold water can be a shock to its system. Avoid watering from above as it can cause problems with the foliage. Instead, water directly to the soil until it is completely soaked. This helps moisten the roots and allows them to spread and absorb necessary nutrients from the soil.

Why should I put fertilizer on my False african violet?

Like all plants, the False african violet needs soil nutrients for growth. However, it's not always guaranteed that the soil will have all the necessary nutrients. Fertilization and soil amendments ensure that the plants in your garden have both the basic nutrients they need and the specific ones they require. To keep the False african violet healthy, it needs fertilizer for its roots and stems to develop. Fertilization also enhances its ornamental appeal through fantastic-looking foliage, which is important because the foliage is the main attraction of this plant.

What are the sunlight requirements for a False african violet?

False african violet, scientifically known as Streptocarpus saxorum, enjoys partial sun, which means about 3-6 hours of sunlight per day. It can thrive in full sun conditions (above 6 hours of sunlight) in cooler weather but prefers spots that offer a balance of light and shade. This is important to ensure the plant's happiness and avoid damage from overexposure to the sun.

What are the ideal growing conditions for False African Violet?

False African Violet thrives natively in temperatures ranging from 59 to 86°F (15 to 30°C), with a preferred temperature range of 68 to 100°F (20 to 38°C). During the summer months, it's best to keep the plant in a cooler location away from direct sunlight. Conversely, in winter, a warmer spot with access to indirect sunlight is more suitable. This plant loves heat, and colder temperatures can be harmful. In autumn, if grown outdoors, it's advisable to bring the False African Violet indoors, positioning it near a bright window but away from heaters to ensure it stays above 20°C, as temperatures near 5°C can negatively impact the plant.

What should I do if I give my False african violet too much or too little water?

Overwatering is a common issue for False african violets, and it can cause wilting, yellowing of stems and leaves, and diseases like root rot, mold, and mildew. Underwatering is less common but can still happen, resulting in brittle and brown leaves. It's important to notice the signs of overwatering early to prevent irreparable damage. If you observe signs of overwatering, reduce watering immediately and check the soil's drainage. Replace poorly draining soil with a loose and well-draining potting mix. If your plant is not getting enough water, simply water it more regularly until the signs of underwatering disappear.

When should I put fertilizer on my False African Violet?

During the active growth phase of a False African violet, which occurs in spring, summer, and early fall, it will require the highest amount of fertilizer. After winter ends, you should feed it once every two to four weeks until fall. As fall approaches, gradually reduce the amount of fertilizer until you stop feeding it completely in preparation for winter, when the False African violet's growth slows down.

How does the False african violet respond to sunlight?

The False african violet is appreciative of sunlight but does not require it in abundance. It fares best in conditions where the sun isn't too intense, reflecting its native habitat's preferences. Too much direct sunlight can harm the plant's soft leaves, while insufficient light might stunt its growth. This delicate balance showcases its inherited traits and indicates the importance of moderate sunlight exposure.

How should I care for my False African Violet in low temperatures?

False African Violet prefers warmer environments and struggles in low temperatures, thriving best above 20°C and needing to be kept above 5°C during the winter to avoid frost damage. If the temperature drops below 1°C, its leaves might lighten in color and, following frost damage, can turn brown or black with symptoms like wilting and drooping. To mitigate frost damage, trim the frost-damaged parts and immediately move the plant to a warm indoor space. Placing it near a south-facing window provides ample sunlight, but ensure it's not too close to heaters or air conditioning vents to avoid dry air conditions.

How frequently should I water my False african violet plant?

If your False African Violet is in a pot, the most accurate way to determine if it needs water is by checking the moisture level of the soil. Simply stick your finger into the soil and if the top two to three inches feel dry, it's time to water your plant. The same method can be used if you have planted your False African Violet outdoors in the ground. Once again, when the top few inches of soil have dried out, it's time to give it a drink. Typically, during the spring and early fall, you'll need to water this plant about once a week using this method. However, when the weather becomes extremely hot, you might need to water it around twice or even more per week. Keep in mind that mature and well-established False African Violets can handle drought quite well.

When is it not a good idea to fertilize my False African Violet?

Typically, you should feed your False african violet regularly throughout the year, except for during winter. This means spring, summer, and most of the fall are ideal for feeding. However, if you happen to over-fertilize or incorrectly fertilize the plant, causing fertilizer burn or other issues, you'll need to fix those before resuming regular feeding. During winter, when the plant goes into a dormant phase, it doesn't require or benefit from feeding. In fact, feeding it during this time can actually lead to fertilizer burn.

What artificial lighting requirements do indoor False african violets have?

Indoor False african violets, when natural sunlight is insufficient, especially during winter or in less sunny spaces, can greatly benefit from artificial lighting for optimal growth. LED lights are recommended due to their ability to be customized to the specific light wavelengths needed by plants. Full sun plants require 30-50W/sq ft of artificial light, partial sun plants need 20-30W/sq ft, and full shade plants should have 10-20W/sq ft. The light source should be placed 12-36 inches above the plant to mimic natural sunlight, ensuring plants receive about 8-12 hours of light per day.

What steps should I take if my False African Violet experiences high temperatures?

In high temperatures, especially during summer when it's important to keep the False African Violet below 38°C, excessive heat above 43°C can cause the leaves to lighten and increase the risk of sunburn. To care for a plant that has suffered from high temperature or sunburn, trim away the sunburned and dried parts. Relocate the plant to an area shielded from midday and afternoon sun, providing it with shade. Watering the plant in the morning and evening helps to keep the soil consistently moist, aiding in its recovery and ongoing health.

PLATES
Streptocarpus saxorum leaf
PLATE 01 · leaf
Streptocarpus saxorum leaf
PLATE 02 · leaf
Streptocarpus saxorum flower
PLATE 03 · flower
Streptocarpus saxorum flower
PLATE 04 · flower
Streptocarpus saxorum fruit
PLATE 05 · fruit
Streptocarpus saxorum fruit
PLATE 06 · fruit
ALSO IN THE LIBRARY

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