Jicama
Pachyrhizus Erosus
Jicama, also known as Mexican Turnip or Yam Bean, is a unique tuberous root vegetable native to Mexico and Central America. Valued for its crunchy texture and sweet flavor, it is a popular ingredient in salads and snacks, making it a favorite among gardeners looking to grow something different.
Everything it needs
9 essentials at a glance
Watering
Jicama prefers consistently moist soil, requiring watering every 1-2 weeks depending on the climate.
In hot weather, increase frequency to weekly. Ensure the soil is well-draining to prevent root rot. Signs of over-watering include yellowing leaves and mushy roots, while under-watering can cause wilting and leaf drop.
Light
Jicama thrives in full sun, requiring at least 6-8 hours of direct sunlight daily.
Ideal placement is in a south-facing garden bed or container. It can tolerate partial shade but may result in slower growth and reduced tuber size.
Soil
The ideal soil for Jicama is sandy loam with a pH range of 6.0 to 7.0.
It requires good drainage to prevent waterlogging. A recommended potting mix includes equal parts of compost, peat moss, and perlite to ensure aeration and moisture retention.
Humidity
Jicama prefers moderate humidity levels of around 50-70%.
To increase humidity, mist the leaves or place a humidifier nearby. Signs of humidity stress include browning leaf tips and stunted growth.
Temperature
Jicama grows best in temperatures between 70°F to 85°F (21°C to 29°C) and is sensitive to frost.
It is suitable for USDA hardiness zones 9-11. Protect the plant from extreme heat above 90°F (32°C) and ensure it is harvested before the first frost.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10 every 4-6 weeks during the growing season.
Reduce feeding in late summer as the plant prepares for harvest. Signs of nutrient deficiency include yellowing leaves and poor tuber development.
Pruning
Prune Jicama to encourage bushier growth and better air circulation.
Use clean, sharp pruning shears to remove any dead or damaged leaves. Pruning is best done in early spring before the growing season begins.
Repotting
Repot Jicama when it outgrows its container, typically every 1-2 years.
Signs it needs repotting include roots growing out of the drainage holes and stunted growth. Choose a pot 1-2 inches larger in diameter and follow the same soil recommendations during repotting.
Propagation
Jicama is typically propagated from seeds.
Plant seeds 1-2 inches deep in well-prepared soil after the last frost. Ensure a spacing of 12-18 inches between seeds. Best timing for planting is in spring when soil temperatures are consistently warm.
When it's unhappy
Yellowing leaves
Why it happens
This can be caused by nutrient deficiency or over-watering.
How to fix it
Check the soil moisture and adjust watering practices. Fertilize with a balanced fertilizer to address nutrient deficiencies.
Root rot
Why it happens
Over-watering or poorly draining soil can lead to root rot.
How to fix it
Ensure proper drainage and reduce watering frequency. If root rot is suspected, remove affected roots and repot in fresh soil.
Wilting leaves
Why it happens
Wilting can occur due to under-watering or extreme heat.
How to fix it
Increase watering frequency and provide shade during the hottest parts of the day to alleviate stress.
Pest infestations (aphids, spider mites)
Why it happens
Pests can thrive in warm, dry conditions.
How to fix it
Regularly inspect the plant and use insecticidal soap or neem oil to treat infestations.
Stunted growth
Why it happens
This can be due to poor soil quality or insufficient light.
How to fix it
Ensure the plant receives adequate sunlight and amend the soil with organic matter to improve fertility.
Care through the year
Spring
In spring, plant Jicama seeds after the last frost. Ensure soil is warm and well-drained. Begin regular watering and fertilizing.
Summer
During summer, maintain consistent moisture and provide shade during extreme heat. Monitor for pests and diseases.
Fall
In fall, prepare for harvest as leaves begin to yellow. Reduce watering to allow tubers to mature.
Winter
In winter, protect Jicama from frost if grown in colder climates. If in containers, consider bringing them indoors or providing insulation.
Toxicity & Safety
Jicama is generally safe for pets and children; however, the raw seeds and leaves are toxic if ingested, causing symptoms like nausea and vomiting. The edible part is the tuber, which is safe to eat when cooked.
Good to know
How often should I water my Jicama?
Water Jicama every 1-2 weeks, adjusting for climate. Ensure the soil is consistently moist but not waterlogged.
What type of soil is best for Jicama?
Jicama thrives in sandy loam with a pH of 6.0 to 7.0. Ensure good drainage to prevent root rot.
Can Jicama be grown in containers?
Yes, Jicama can be grown in containers. Choose a pot that is at least 12 inches deep to accommodate root growth.
What pests affect Jicama plants?
Common pests include aphids and spider mites. Regular inspection and treatment with insecticidal soap can help manage these pests.
When is the best time to harvest Jicama?
Harvest Jicama tubers 3-4 months after planting, once the leaves start to yellow and die back.
Is Jicama safe for pets?
Yes, Jicama is safe for pets, but avoid letting them eat the leaves and seeds, which are toxic.
How can I increase humidity for my Jicama plant?
Increase humidity by misting the leaves or placing a humidifier nearby, especially in dry environments.
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