How to Grow Kohlrabis - Test
  • 1. What family does kohlrabi belong to?
A) Cucurbitaceae
B) Solanaceae
C) Brassica
D) Asteraceae
  • 2. Kohlrabi is essentially a swollen...
A) Root
B) Leaf
C) Stem
D) Fruit
  • 3. When is the best time to plant kohlrabi for a spring harvest?
A) Late Fall
B) Early Spring
C) Late Summer
D) Mid-Winter
  • 4. What soil pH is ideal for kohlrabi?
A) 4.5-5.5
B) 9.5-10.5
C) 8.0-9.0
D) 6.0-7.5
  • 5. How much sunlight does kohlrabi need daily?
A) 4-5 hours
B) 0 hours
C) 6+ hours
D) 2-3 hours
  • 6. What type of soil is best for kohlrabi?
A) Rocky
B) Clay-heavy
C) Well-draining, fertile
D) Sandy, infertile
  • 7. What is the recommended spacing between kohlrabi plants?
A) 6-9 inches
B) 3 feet
C) 18-24 inches
D) 1 inch
  • 8. How deep should kohlrabi seeds be planted?
A) 3 inches
B) 1/4 - 1/2 inch
C) 2 inches
D) 1 inch
  • 9. What is a common pest that affects kohlrabi?
A) Cabbage worms
B) Aphids
C) Tomato hornworms
D) Squash bugs
  • 10. What is a common disease that affects kohlrabi?
A) Late blight
B) Clubroot
C) Powdery mildew
D) Septoria leaf spot
  • 11. How often should kohlrabi be watered?
A) Never, relies on rainfall
B) Regularly, keeping soil moist
C) Only when soil is completely dry
D) Once a week
  • 12. When is kohlrabi typically ready to harvest?
A) When bulb is 2-3 inches in diameter
B) When bulb is 6 inches in diameter
C) When leaves turn yellow
D) When flowers appear
  • 13. What part of the kohlrabi plant is typically eaten?
A) The roots
B) The flowers
C) The leaves only
D) The bulb
  • 14. How can you prevent kohlrabi from becoming woody?
A) Harvesting when young and tender
B) Planting in shade
C) Watering less frequently
D) Adding more fertilizer
  • 15. What nutrient is important for kohlrabi's bulb development?
A) Nitrogen
B) Potassium
C) Calcium
D) Phosphorus
  • 16. What is a good companion plant for kohlrabi?
A) Marigolds
B) Rosemary
C) Mint
D) Fennel
  • 17. What is the typical lifespan of a kohlrabi plant?
A) Biennial
B) Depends on the variety
C) Annual
D) Perennial
  • 18. How should kohlrabi be stored after harvest?
A) Frozen without blanching
B) Refrigerated
C) Dried in the sun
D) At room temperature
  • 19. What benefit does crop rotation provide for kohlrabi?
A) Increases soil salinity
B) Reduces pest and disease buildup
C) Depletes soil nutrients
D) Attracts pollinators
  • 20. What does 'bolting' refer to in kohlrabi?
A) Root rot
B) Premature flowering
C) Bulb cracking
D) Leaf discoloration
  • 21. What can cause kohlrabi to bolt prematurely?
A) Rich soil
B) Consistent watering
C) Temperature fluctuations
D) Consistent sunlight
  • 22. Which of these is a common kohlrabi variety?
A) Cantaloupe
B) Roma
C) Beefsteak
D) Purple Vienna
  • 23. Why is it important to control weeds around kohlrabi?
A) Weeds attract beneficial insects
B) Weeds help retain soil moisture
C) Weeds improve soil aeration
D) Weeds compete for nutrients and water
  • 24. How can you control cabbage white butterflies?
A) Overwatering
B) Lack of fertilizer
C) Netting
D) Planting in shade
  • 25. Why might kohlrabi bulbs split?
A) Too much fertilizer
B) Inconsistent watering
C) Too little sunlight
D) Lack of nutrients
  • 26. What is a good source of fertilizer for kohlrabi?
A) Gasoline
B) Motor oil
C) Composted manure
D) Bleach
  • 27. How does hilling around the base of the kohlrabi help?
A) Discourages root growth
B) Attracts pests
C) Reduces sunlight exposure
D) Provides support and encourages root growth
  • 28. Which part of the kohlrabi provides the most Vitamin C?
A) Neither part
B) The roots
C) Both bulb and leaves
D) The bulb
  • 29. Which planting method is suitable for Kohlrabi?
A) Air layering
B) Direct sowing and transplanting
C) Only direct sowing
D) Only transplanting
  • 30. What is the impact of boron deficiency in Kohlrabi plants?
A) Yellow leaves
B) Hollow stem
C) Stunted growth
D) Root rot
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