Solanum capsicoides, the cockroach berry, known as polohauai'i in Polynesia, is a flowering plant in the family Solanaceae. It is native to eastern Brazil but naturalized in other tropical regions, where it sometimes becomes an invasive weed.
Cockroach berry is resistant to many diseases and typically does not suffer from them. Still, it can be vulnerable to pests and illnesses present in its environment. When infections do occur, they are usually mild. For care, the plant needs moderate maintenance. Regular pruning is required to keep a neat appearance and support healthy growth. Fertilizing can also help encourage flowering. Cockroach berry is suitable for anyone with outdoor space, such as a garden or patio, and does not demand extensive care experience. It may need more attention if grown indoors.
How to keep Solanum Capsicoides.
Light
Cockroach berry prefers spots with abundant light for optimal growth, though it does reasonably well in partially shaded areas. In its natural setting, full sun promotes vigorous growth. Both too little and too much light can negatively affect its health and development.
Water
Cockroach Berry thrives in environments that are rich in humidity and moisture. It prefers consistent levels of humidity and can tolerate moderate drought conditions. For optimal growth, water the plant every 2 to 3 weeks, ensuring the soil remains slightly moist. As an evergreen, indoor specimens may require more frequent watering since indoor conditions usually have lower humidity than outdoor environments.
Temperature
Cockroach berry grows naturally in regions where temperatures range from 68 to 100 °F (20 to 38 ℃). The plant does best in warm conditions. It may require adjustments for temperature fluctuations, especially during the cooler months.
Fertilizer
The best time to fertilize a Cockroach berry is in early spring, when it comes out of dormancy. This supports overall growth and flower development. Fertilizing improves foliage, stems, and branches, and encourages large, vibrant, long-lasting flowers. It helps move nutrients from the roots to the flowers and enhances the plant’s health and disease resistance.
Pruning
The cockroach berry is a thorny shrub that produces red berries and white flowers. It's best to prune it from early to late spring. Focus on removing dead or overly dense branches to promote healthy growth and improve air circulation. Use clean tools and make your cuts just above the lateral buds, as the cockroach berry is sensitive to heavy pruning.
Botanical profile.
- Plant Type
- Herb
- Life Cycle
- Perennial, Annual
- Genus
- Solanum
- Family
- Solanaceae
- Hardiness Zone
- 9-11
- Mature Height
- 30 cm to 91 cm
- Mature Spread
- 0.91 m to 1.52 m
- Leaf Color
- Green, Dark Green
- Leaf Type
- Semi-evergreen
- Flower Color
- White
- Flower Size
- 2.54 cm
- Bloom Time
- All year round
- Planting Time
- Spring, Summer, Autumn
- Harvest Time
- All year round
- Native Area
- Brazil, Colombia, Venezuela
Other names.
Reader questions.
What's the easiest way to water my Cockroach berry?
To promote excellent root development, place a garden hose at the base of the plants. Avoid spraying the leaves directly and be aware that leaves will need more water if they are in direct sunlight outdoors. You can use bubblers for each plant to keep the roots moist, or soaker hoses to cover the entire garden or bed when adding or removing plants. After watering, drain any excess water and wait for the soil to dry before watering again. It is best to water at ground level to prevent diseases. On sunny days, consider spraying the entire bush with water. Whether the plant is in a pot or in the ground, remember that Cockroach berry prefers deep watering rather than light sprinkling.
What are the sunlight requirements for Cockroach berry (Solanum capsicoides)?
Cockroach berry thrives in conditions ranging from full sun to partial shade. Full sun is defined as above 6 hours of direct sunlight per day, whereas partial sun refers to about 3-6 hours of sunlight. In its natural habitat, full exposure to sunlight encourages vigorous growth, but the plant also manages decently well in areas with some shade. Insufficient or excessive light could impede its health and development, so it is important to watch how sunlight moves through your garden to choose spots that provide the perfect balance of light and shade for your plants.
What is the native climate for Cockroach berry?
Cockroach berry, or Solanum capsicoides, thrives in climates where temperatures range from 68 to 100°F (20 to 38°C). This plant loves warm conditions and requires adjustments especially during cooler months to maintain its health. Particularly during autumn and winter, it's crucial to keep the plant in conditions that do not drop below 20°C and certainly avoid temperatures approaching 0°C, which can be harmful to the plant. To ensure its growth during colder months, it is advisable to bring the plant indoors and place it near a bright window while keeping it away from direct heat sources.
If I give Cockroach berry too much or too little water, what should I do?
An overwatered Cockroach berry may display several symptoms. Its leaves can turn yellow, drop off, and wilt, giving the plant a dull and unhealthy appearance. Mushy stems may also be observed. In such cases, it is advisable to adjust your watering schedule. Additionally, wilting can also indicate under watering, characterized by crispy and dry leaves. If the soil becomes dry and regular watering proves insufficient, provide a thorough watering to the Cockroach berry. Sufficient water can help the plant recover; however, it may still exhibit dryness and yellow leaves for a few days due to root damage. Once the plant returns to normal, the yellowing of leaves will cease. When keeping the Cockroach berry indoors, always check moisture levels and avoid overwatering. Look for signs of black spots, and if present, allow the soil in the pot to dry out by withholding water for a few days. Overwatering can lead to root rot, which necessitates transferring the plant to a different pot, especially if discolored and slimy roots are observed. Preventing root rot is crucial, so avoid excessively soggy soil. When planting the Cockroach berry outdoors, dig a bit deeper to assess soil moisture. If it feels too dry, it could indicate under watering, requiring adequate watering to aid in the plant's recovery.
How should artificial lighting be used for indoor Cockroach berry plants?
When natural sunlight is insufficient for indoor Cockroach berry plants, especially in winter or less sunny spaces, artificial lighting provides a vital solution for optimal growth. LED lights are recommended due to their customizable light wavelengths. For full sun plants, 30-50W/sq ft of artificial light is needed; for partial sun plants, 20-30W/sq ft; and for full shade plants, 10-20W/sq ft. The light source should be placed 12-36 inches above the plant to mimic natural sunlight, and most plants require 8-12 hours of light per day to mimic the length of natural daylight hours.
How do you care for a Cockroach berry plant in low temperatures?
Cockroach berry plants prefer warm temperatures and do not tolerate cold well. They flourish the best when the temperature remains above 20°C and should be kept above freezing point during winter. Exposure to temperatures below -5°C can lead to lighter colored leaves, which can gradually turn brown or black and show signs of wilting and drooping as frost damage appears. To recover a plant from frost damage, trim off the damaged parts and immediately move the plant to a warmer indoor setting. Placing it near a south-facing window ensures it gets enough sunlight, but make sure it's at a safe distance from heaters or air conditioning vents to avoid air that is too dry.
How often do I need to water my Cockroach berry plant?
The Cockroach berry prefers deep and infrequent watering, especially when grown in pots. Since the water storage in pots is limited and the soil dries out faster, it's important to soak them with a gallon of water each time. In cold regions, watering every 3 to 5 days is necessary. Watering should be done early in the morning when the soil is dry, both indoors and outdoors. To determine if watering is needed, check the soil inside the pot. When the top 2-3 inches of soil are dry, it's time to give the plant a full watering. During hot days, check the moisture daily as heat can quickly dry out the pot's soil. In garden settings, irrigation of the soil is also necessary. In hot climates, watering once a week is sufficient. Only water when you notice about 2 to 3 inches of soil becoming too dry indoors or outdoors. Take into account the amount of rainfall on the plant and avoid adding water to prevent root rot. If there is a lot of rainfall, additional watering may not be needed. The Cockroach berry typically grows during spring and fall. When planted outdoors, add 3 to 4 inches of mulch to help conserve water. Sandy soil requires more frequent watering, as it tends to drain faster. On the other hand, clay soil requires less frequent watering, with 2-3 days of drying time to avoid root rot. Consider marking the date on the calendar whenever you water the plants and take note if the leaves start to droop, as this may indicate you need to water a day earlier.
What are the symptoms of light deficiency in Cockroach berry plants?
When Cockroach berry plants are exposed to insufficient lighting, several symptoms may occur: new leaves may grow smaller, the plant may exhibit leggy or sparse growth due to longer spaces between leaves or stems, leading to a weak appearance. Plants might also experience faster leaf drop, slower or no new growth, lighter-colored new leaves indicating a lack of chlorophyll, and symptoms of overexposure like chlorosis, sunscald, leaf curling, wilting, and leaf scorching. Each of these conditions reflects the plant's struggle with inadequate exposure to light.
What should you do if a Cockroach berry plant gets too hot?
During the hotter months, it's critical to keep Cockroach berry plants below 38°C to prevent heat stress. When temperatures soar above 43°C, the plant's leaves may lighten, indicating the risk of sunburn. To aid a plant that's been exposed to excessive heat, trim away the sunburned and dried portions. Then, move the plant to a spot where it can be shaded from the most intense midday and afternoon sun. Ensuring the plant is watered in the morning and evening can help keep the soil appropriately moist, further mitigating the effects of high temperatures.
How much water should I give my Cockroach berry?
The Cockroach berry typically requires a gallon of water on a regular schedule. For potted plants, it's best to water them deeply until you see water dripping from the bottom of the pot. Allow the soil to dry before watering again, and you can use a water calculator or moisture meter to determine the amount of water you've given to your plant in a week. During the flowering period, provide plenty of water but allow the moisture to evaporate afterwards to prevent root rot. If the Cockroach berry is planted outdoors and receives sufficient rainfall, it may not need additional watering. When the plant is young or newly planted, make sure it receives 1-2 inches of rain per week. As the Cockroach berry grows, it can rely solely on rainfall. Only in very hot weather or prolonged periods without rain (2-3 weeks) should you consider giving the plant a full watering during the cooler parts of the day to prevent heat damage. Additional watering will be necessary during extended dry spells.
How can I address light-related issues in Cockroach berry plants?
To ensure optimal growth and address light-related issues in Cockroach berry plants, consider gradually moving plants to sunnier locations, ensuring at least 6 hours of direct sunlight daily. For indoor plants, use a south-facing window and keep curtains open during the day or supplement with artificial lights for at least 8 hours daily. Outdoor plants should be moved gradually to avoid shock. If trees or buildings obstruct sunlight, consider pruning or transplanting the plant to a sunnier spot. Though parts of the plant affected by insufficient sunlight may not recover, new growth should be healthy if the light exposure is increased.
Should I change how often I water my Cockroach berry plant depending on the time of year or the weather?
The Cockroach berry is an outdoor plant that thrives in rainy conditions. However, it can withstand dry weather as long as you water it when needed. In the spring and fall, it does well with moist soil, but be careful not to make it too soggy. Alternating between dry and moist soil conditions will promote its growth. During the hot summer months, water evaporates quickly, so you may need to water more frequently to keep the plant moist. In winter, the Cockroach berry requires less water since it drops its leaves and becomes dormant. Use a well-draining soil mixture like terracotta to allow water to evaporate faster. Once it starts leafing out and going dormant, you can rely on fall and winter rains to nourish it. When encouraging growth and blooming in spring, be mindful of good drainage, especially during winter. In pots, the plant has limited root growth, so keep them well-watered, especially in summer. Deep soaking once or twice a week, depending on the weather, is better than shallow sprinkles. Avoid allowing the plant to dry out completely during dormancy. Do not overwater or let the plant sit in water for too long, as this can cause harm. Applying mulch is beneficial for reducing stress, conserving water, and promoting healthy blooms.