Question

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planting space. make sure you purchase a quality tree with a healthy root system (10 inches of container width per inch of trunk diameter at six inches above the soil line). dig the hole to the depth of the root ball, and no deeper. use native soil to backfill and wood chips for mulch. staking should not be needed unless the trunk is over three inches in diameter.

based on the documents shown, hardiness refers to the:

a. average trunk strength of the tree species.
b. likelihood that the tree will grow well.
c. average crown diameter of the tree species.
d. likelihood that the tree will provide the needed shade.
e. percentage of solar heat absorbed by the tree.

Explanation:

To determine the meaning of "hardiness" in the context of tree planting (even though the document snippet focuses on planting steps, we infer the general horticultural context), we analyze each option:

• Option A: Trunk strength relates to staking needs (mentioned for trunks over 3 inches), but "hardiness" isn't about trunk strength. Eliminate A.
• Option B: In horticulture, "hardiness" typically refers to a plant's ability to grow well in its environment (e.g., climate, soil). This matches the idea of a tree thriving.
• Option C: Crown diameter is about the tree's top spread, not hardiness. Eliminate C.
• Option D: Shade provision depends on crown size, not hardiness. Eliminate D.
• Option E: Solar heat absorption is about the tree's role in cooling, not hardiness. Eliminate E.

Answer:

B. likelihood that the tree will grow well.