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