Turnip
Brassica Rapa Rapa
Brassica rapa rapa, commonly known as Turnip, is a versatile root vegetable prized for its edible roots and greens. Native to Europe and Asia, this plant is easy to grow and provides nutritious harvests, making it a favorite among home gardeners.
Everything it needs
9 essentials at a glance
Watering
Brassica rapa rapa prefers consistent moisture, so water regularly, about 1 inch per week, adjusting for rainfall.
During dry spells, increase frequency to ensure soil remains moist but not soggy. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause wilting and stunted growth.
Light
This plant thrives in full sun, requiring at least 6 hours of direct sunlight daily.
It can tolerate partial shade, especially in hotter climates, but full sun is ideal for optimal growth. Ensure placement allows for good air circulation to prevent fungal diseases.
Soil
Brassica rapa rapa prefers well-draining, loamy soil with a pH range of 6.0 to 7.0.
A potting mix that includes compost, peat moss, and perlite is recommended to enhance drainage and nutrient content. Ensure the soil is rich in organic matter to support healthy growth.
Humidity
Turnips prefer moderate humidity levels around 40-60%.
To increase humidity, mist the plants or place a humidity tray nearby. Signs of low humidity include leaf curling and browning edges, while excessive humidity can lead to fungal issues.
Temperature
The ideal temperature range for Brassica rapa rapa is between 60-70°F (15-21°C).
It is hardy in USDA zones 2-9, tolerating light frost but thriving in cooler temperatures. Avoid extreme heat, as it can cause bolting and poor root development.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10 or similar, applying every 4-6 weeks during the growing season.
Avoid over-fertilizing, which can lead to excessive leaf growth at the expense of root development. Signs of nutrient deficiency include yellowing leaves and poor root formation.
Pruning
Pruning is not typically necessary for Brassica rapa rapa, but removing any yellowing or damaged leaves can help improve air circulation.
Use clean, sharp scissors or pruning shears for any cuts. Regularly check for pests and diseases, and remove affected leaves promptly.
Repotting
If growing in containers, repot when roots become crowded, usually every 1-2 years.
Choose a pot that is 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes and stunted growth. When repotting, gently loosen the roots and place in fresh potting mix.
Propagation
Brassica rapa rapa is typically propagated from seeds.
Sow seeds directly in the garden or in pots about 1/4 to 1/2 inch deep, spaced 2-4 inches apart. Best timing for sowing is in early spring or late summer for fall harvest. Thin seedlings to allow for proper spacing as they grow.
When it's unhappy
Yellow leaves
Why it happens
Nutrient deficiency, particularly nitrogen, or over-watering.
How to fix it
Ensure proper fertilization and adjust watering practices to maintain consistent moisture without waterlogging.
Root rot
Why it happens
Excessive moisture and poor drainage.
How to fix it
Improve drainage by amending soil with perlite or sand, and reduce watering frequency.
Bolting
Why it happens
Exposure to high temperatures or stress.
How to fix it
Provide shade during hot weather and ensure consistent watering to reduce stress.
Pest infestations (aphids, flea beetles)
Why it happens
Attraction to young, tender leaves.
How to fix it
Use insecticidal soap or neem oil as a preventive measure and regularly inspect plants.
Fungal diseases (downy mildew)
Why it happens
High humidity and poor air circulation.
How to fix it
Ensure adequate spacing between plants and avoid overhead watering to improve air flow.
Care through the year
Spring
In spring, sow seeds directly in the garden or containers. Ensure soil is warm enough and keep it consistently moist. Thin seedlings as they grow to prevent overcrowding.
Summer
Monitor for pests and diseases, and provide shade during particularly hot spells. Water regularly to prevent bolting and maintain healthy growth.
Fall
Harvest turnips when they reach a desirable size, typically 2-3 months after planting. Continue to water and care for any remaining plants as temperatures drop.
Winter
In colder climates, protect turnips with mulch to prevent freezing. If grown in containers, consider bringing them indoors or to a sheltered location during extreme cold.
Toxicity & Safety
Brassica rapa rapa is generally non-toxic to pets and children. However, excessive consumption may lead to gastrointestinal upset. The leaves and roots are edible and safe, but always wash thoroughly before consumption.
Good to know
Why are my turnip leaves turning yellow?
Yellowing leaves on Brassica rapa rapa can indicate nutrient deficiencies, particularly nitrogen, or over-watering. Check your fertilization schedule and adjust watering practices.
How often should I water my turnips?
Water your turnips consistently, aiming for about 1 inch of water per week. Adjust frequency based on rainfall and temperature to keep the soil moist but not soggy.
What is the best soil for growing turnips?
Turnips thrive in well-draining, loamy soil with a pH of 6.0 to 7.0. A mix of compost, peat moss, and perlite is ideal for providing nutrients and good drainage.
When is the best time to plant turnips?
The best time to plant Brassica rapa rapa is in early spring or late summer for a fall harvest. This timing helps avoid extreme heat and promotes optimal growth.
How can I prevent pests on my turnip plants?
To prevent pests like aphids and flea beetles, regularly inspect your plants and use insecticidal soap or neem oil as a preventive measure. Good air circulation also helps deter pests.
What should I do if my turnips are bolting?
If your turnips are bolting, it is likely due to high temperatures or stress. Provide shade during hot weather and ensure consistent watering to minimize stress.
Can I grow turnips in containers?
Yes, Brassica rapa rapa can be grown in containers as long as they are at least 12 inches deep and wide. Ensure proper drainage and use a quality potting mix for best results.
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