Horticulture Trivia Questions
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Art of garden cultivation. Play Horticulture trivia solo to sharpen your knowledge, or challenge a friend head-to-head in Trivia Tango — every question comes with an explanation so you learn as you play.
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Sample Horticulture Questions
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These small holes in leaves, primarily on the undersides, allow plants to exchange gases and release water vapor during transpiration.
- Chloroplasts
- Nodes
- Lenticels
- Stomata
This number-based system, developed by the USDA, helps gardeners determine which plants can survive winters in their geographic location.
- Heat zone map
- Hardiness zone
- Sunset climate zone
- Köppen classification
Removing spent flower heads before seeds form encourages plants to produce more blooms throughout the growing season.
- Pinching
- Deadheading
- Disbudding
- Topping
This soil type, ideal for most garden plants, combines sand, silt, and clay in relatively balanced proportions with good drainage.
- Loam
- Sandy soil
- Clay soil
- Chalky soil
These beneficial soil organisms form symbiotic relationships with plant roots, extending their reach to access water and nutrients in exchange for sugars.
- Nematodes
- Earthworms
- Mycorrhizal fungi
- Springtails
Before transplanting nursery-grown plants outdoors, gardeners gradually expose them to outdoor conditions through this acclimation process.
- Stratification
- Scarification
- Vernalization
- Hardening off
This structure, typically made of glass or plastic panels, allows gardeners to extend growing seasons by trapping solar heat inside.
- Greenhouse
- Cold frame
- Cloche
- Row cover
This climbing plant adaptation sends out thin, coiling extensions that wrap around supports, pulling the plant upward toward light.
- Aerial roots
- Twining stems
- Tendrils
- Holdfasts
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