How to Cultivate Plums
  • 1. What type of climate is generally best for growing plums?
A) Desert
B) Arctic
C) Temperate
D) Tropical
  • 2. What is the ideal soil pH for plum trees?
A) 4.0-5.0
B) 7.5-8.5
C) 8.5-9.5
D) 6.0-7.0
  • 3. Plum trees need how many hours of chill hours (below 45°F) for proper fruit production?
A) 0-100
B) None
C) 1000+
D) Varies by variety
  • 4. Which of the following is the MOST important factor when choosing a plum tree variety?
A) Fruit color
B) Leaf shape
C) Climate suitability
D) Tree height
  • 5. What is the best time of year to plant bare-root plum trees?
A) Anytime
B) Late fall
C) Late winter/early spring
D) Mid-summer
  • 6. What spacing is recommended for planting standard-sized plum trees?
A) 2-3 feet
B) 30-40 feet
C) 5-10 feet
D) 15-20 feet
  • 7. What is the primary purpose of staking a young plum tree?
A) Attract pollinators
B) Increase fruit yield
C) Provide support
D) Prevent diseases
  • 8. During the first year, how often should a newly planted plum tree be watered?
A) Only during rainfall
B) Regularly, when topsoil is dry
C) Daily
D) Once a month
  • 9. Why is it important to prune plum trees?
A) To promote air circulation and fruit production
B) To discourage fruit production
C) To make the tree look aesthetically pleasing only
D) To stunt growth
  • 10. What type of pruning cut encourages new growth outward?
A) Removing all buds
B) Cutting randomly
C) Cutting to an inward-facing bud
D) Cutting to an outward-facing bud
  • 11. What is 'thinning' in the context of plum tree care?
A) Removing excess leaves
B) Removing excess fruit
C) Removing branches
D) Adding fertilizer
  • 12. Why is thinning plums important?
A) To prevent the tree from growing too tall
B) To improve fruit size and quality
C) To attract more birds
D) To increase the number of plums
  • 13. Which of the following is a common pest of plum trees?
A) Ladybugs
B) Butterflies
C) Earthworms
D) Plum curculio
  • 14. Which of the following is a common disease of plum trees?
A) Black spot
B) Brown rot
C) Powdery mildew
D) Green leaf disease
  • 15. What is one organic method to control plum curculio?
A) Gasoline
B) Kaolin clay spray
C) Bleach spray
D) Ignoring the problem
  • 16. What type of fertilizer is generally recommended for plum trees?
A) Balanced fertilizer
B) No fertilizer
C) High nitrogen fertilizer
D) Weed killer
  • 17. When should you fertilize plum trees?
A) Winter
B) Late fall
C) Mid-summer
D) Early spring
  • 18. What is the purpose of mulching around a plum tree?
A) Suffocate the roots
B) Retain moisture and suppress weeds
C) Prevent pollination
D) Attract pests
  • 19. What type of mulch is best for plum trees?
A) Gravel
B) Plastic mulch
C) Rocks
D) Organic mulch like wood chips
  • 20. How can you tell when a plum is ripe?
A) Slightly soft to the touch and easily pulls from the tree
B) Hard as a rock
C) Falls off the tree easily
D) Completely green
  • 21. What is grafting?
A) Adding fertilizer
B) Watering deeply
C) Joining two plants together
D) Removing dead branches
  • 22. Why is grafting sometimes used in plum cultivation?
A) To make the tree taller
B) To kill the tree
C) To prevent fruit production
D) To combine desirable traits
  • 23. What does 'self-pollinating' mean for a plum tree?
A) It needs constant watering
B) It can produce fruit without another plum tree
C) It's resistant to all pests
D) It only produces green plums
  • 24. What is cross-pollination?
A) Pollination between two different plum varieties
B) Pollination between a plum and an apple tree
C) Self-pollination
D) Pollination using only wind
  • 25. How can you improve pollination for plum trees?
A) Removing all flowers
B) Spraying pesticides
C) Keeping bees away
D) Planting pollinator-attracting plants
  • 26. What is the first step you should take if you notice a disease on your plum tree?
A) Ignore it and hope it goes away
B) Over-water the tree
C) Identify the disease
D) Immediately cut down the tree
  • 27. What is the best way to store harvested plums?
A) In direct sunlight
B) Frozen immediately
C) Refrigerated
D) In a warm, humid place
  • 28. How long does it typically take for a newly planted plum tree to produce fruit?
A) Never
B) 10+ years
C) 1 year
D) 3-6 years
  • 29. What is the purpose of dormant oil spray on plum trees?
A) To make the leaves shiny.
B) To control overwintering pests and diseases.
C) To speed up fruit production.
D) To attract more birds.
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