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Quiz: Garden Design With Native Plants

Test your understanding of site assessment, plant selection, garden design principles, and creating functional native landscapes.

1. What is the first step in designing a native plant garden, before selecting any plants?

  1. Choose your favorite flower colors and arrange them aesthetically
  2. Buy a pre-designed plant collection from a garden center
  3. Conduct a thorough site assessment of sunlight, soil moisture, soil type, and microclimates
  4. Remove all existing vegetation immediately
Show Answer

The correct answer is C. Every successful native garden begins with a thorough site assessment. Before buying a single plant, you need to understand the conditions your garden offers: how much sunlight each area receives, how wet or dry the soil is, what type of soil you have, and whether any microclimates exist. Plants matched to their site establish faster, need less care, and are more resilient. Skipping this step leads to plant failures and wasted money.

Concept Tested: Site Assessment

See: Chapter 10

2. How is "full sun" defined for plant selection purposes?

  1. Any area that receives sunlight at some point during the day
  2. An area receiving 6 or more hours of direct sunlight per day
  3. An area with no trees within 50 feet
  4. An area that faces south regardless of obstructions
Show Answer

The correct answer is B. Full sun means 6 or more hours of direct sunlight per day. South- and west-facing areas typically qualify. Partial sun or partial shade means 3 to 6 hours, while full shade means fewer than 3 hours of direct sun. To measure accurately, check your garden area every two hours on a sunny midsummer day and tally the hours of direct sun exposure. Sun patterns also shift seasonally, which matters for spring ephemeral plantings.

Concept Tested: Sun Exposure Analysis

See: Chapter 10

3. What does the percolation test tell you about your garden site?

  1. The pH level of your soil
  2. The nutrient content available to plants
  3. How quickly water drains through your soil, indicating whether the site is dry, mesic, or wet
  4. The depth of the water table beneath your property
Show Answer

The correct answer is C. The percolation test measures drainage speed: dig a 12-inch hole, fill it twice (letting it drain the first time), then time the second draining. Less than 1 hour indicates fast drainage (dry site), 1-4 hours indicates moderate drainage (mesic site), and more than 4 hours indicates slow drainage (wet site). This simple test helps match plants to your actual moisture conditions — critical because a prairie plant will drown in a wet site and a wetland plant will die on a dry one.

Concept Tested: Soil Moisture Assessment

See: Chapter 10

4. Why is designing for a seasonal bloom sequence important in a native garden?

  1. It ensures the garden looks exactly the same in every month
  2. It provides continuous nectar and pollen for pollinators from spring through fall and maintains year-round visual interest
  3. It prevents any single plant from growing too large
  4. It is only important for commercial landscape installations
Show Answer

The correct answer is B. A seasonal bloom sequence ensures continuous resources for pollinators — gaps in bloom time can be devastating, especially for bees in early spring. It also provides visual interest from April through October and beyond, with different plants taking center stage in each season. Design should include spring ephemerals, early summer wildflowers, midsummer peak bloomers, late summer and fall species, and plants with winter structural interest like seed heads and ornamental grasses.

Concept Tested: Seasonal Bloom Sequence

See: Chapter 10

5. What is the "right plant, right place" principle in native garden design?

  1. Always plant the most expensive species in the most visible location
  2. Select plants based on matching their habitat requirements (sun, moisture, soil) to actual site conditions
  3. Place native plants only in the backyard where neighbors cannot see them
  4. Use identical plants throughout the entire garden for a uniform appearance
Show Answer

The correct answer is B. The "right plant, right place" principle means selecting plants whose natural habitat requirements match your actual site conditions. A sun-loving prairie plant will struggle in shade, and a bog plant will die on a dry hillside. When plants are matched to their site, they establish faster, require less watering and maintenance, and are naturally more resistant to pests and diseases. This principle is the foundation of successful native garden design.

Concept Tested: Plant Selection Criteria

See: Chapter 10

6. In a layered planting design, how should plants of different heights be arranged?

  1. All plants should be the same height for a uniform appearance
  2. Tallest plants in the center with progressively shorter plants toward the edges, or tallest in back with shorter in front for beds viewed from one side
  3. Shortest plants should always be in the center surrounded by tall plants
  4. Plant height does not matter as long as colors coordinate
Show Answer

The correct answer is B. Layered planting design arranges plants by height to create visual depth and ensure all species are visible. In island beds viewed from all sides, place tallest plants in the center with progressively shorter species toward the edges. In beds viewed from one side (against a fence or house), place tallest plants in the back and shortest in front. This layering also mimics natural plant communities where different species occupy different vertical zones.

Concept Tested: Layered Planting Design

See: Chapter 10

7. What three moisture zones should be considered when designing a rain garden?

  1. Desert, tropical, and temperate zones
  2. Wet center (bottom), moist middle (slopes), and dry edges (upper rim)
  3. Sandy, loamy, and clay zones
  4. Shallow, medium, and deep root zones
Show Answer

The correct answer is B. Rain gardens have three distinct moisture zones based on their bowl shape: the wet center (bottom) where water pools temporarily, the moist middle (slopes) where water passes through, and the dry edges (upper rim) that rarely stand in water. Plants must be selected for each zone: water-tolerant species like Blue Flag Iris and Fox Sedge in the center, moderate-moisture plants like Joe-Pye Weed on the slopes, and drier-condition plants like Blazing Star on the upper edges.

Concept Tested: Rain Garden Design

See: Chapter 10

8. You have a shaded front yard under mature oak trees and want to create an attractive native garden. Which garden style would be most appropriate?

  1. Prairie garden with full-sun wildflowers and tall grasses
  2. Rain garden designed for stormwater management
  3. Shade garden featuring spring ephemerals, ferns, and woodland ground covers
  4. Pollinator garden focused on milkweed and coneflowers
Show Answer

The correct answer is C. A shade garden under mature oaks is ideal for woodland natives like spring ephemerals (Bloodroot, Trillium, Virginia Bluebells), ferns (Maidenhair Fern, Lady Fern), and shade-tolerant ground covers (Wild Ginger, Wild Geranium, Solomon's Seal). Prairie plants and most pollinator garden plants require full sun and would fail under a mature oak canopy. Matching the garden style to your site's actual light conditions is essential for success.

Concept Tested: Shade Garden Design

See: Chapter 10

9. Why is species diversity important in native garden design beyond just aesthetic variety?

  1. More species means a more expensive garden, which signals higher quality
  2. Diverse plantings are more resilient to drought, disease, and pests, and support a wider range of pollinators and wildlife
  3. Species diversity is only important for large-scale restorations, not home gardens
  4. Having many species makes weeding easier because weeds cannot compete
Show Answer

The correct answer is B. Species diversity provides ecological resilience: if one species is hit by drought, disease, or an insect outbreak, others fill the gap. Different species support different pollinators through varied flower shapes, colors, and bloom times. Diverse root systems at different depths improve soil health. A native garden with 15-20 or more species will be far more stable, wildlife-supportive, and visually interesting across seasons than one with only 3-4 species.

Concept Tested: Species Diversity Design

See: Chapter 10

10. What are native lawn alternatives, and why might a homeowner consider them?

  1. Artificial turf that mimics the appearance of native grasses
  2. Low-growing native ground covers and grasses that replace conventional turf, reducing mowing, watering, fertilizing, and pesticide use
  3. Gravel or rock gardens that eliminate all plant maintenance
  4. Dense plantings of non-native ornamental grasses imported from Europe
Show Answer

The correct answer is B. Native lawn alternatives use low-growing native plants like Pennsylvania Sedge, Prairie Dropseed, or native violets to replace conventional turf grass. They dramatically reduce maintenance needs: less or no mowing, no fertilizer, no irrigation once established, and no pesticides. They also provide habitat for pollinators and other wildlife that conventional lawns cannot support. Native lawn alternatives are increasingly popular as homeowners seek lower-maintenance, ecologically beneficial landscapes.

Concept Tested: Native Lawn Alternatives

See: Chapter 10

Ready to use these ideas rather than recall them? Try the Applied Quiz for this chapter — ten scenario questions that put you in a situation and ask what to do.