Which pigment makes grass green?
AnswerChlorophyll
Chlorophyll absorbs light for photosynthesis and reflects green.
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Lawn facts & stats
8 fact-checked facts about lawns, grass care and yard ecology, each with the reason behind it. 4 more are in today's round and join this page after it closes.
The basics
How does a push reel mower cut grass?
AnswerSpinning blades cut against a fixed blade
Reel mowers snip grass with a scissor-like action.
Going deeper
Which of these is a warm-season grass?
AnswerBermuda grass
Bermuda grass thrives in hot summers; the others are cool-season grasses.
What does the lawn care "one-third rule" say?
AnswerDon't cut more than a third of the blade at once
Removing too much height at once stresses the grass.
What is "grasscycling"?
AnswerLeaving clippings on the lawn after mowing
Clippings break down and return nutrients to the soil.
On a fertilizer bag, what do the letters N-P-K stand for?
AnswerNitrogen, phosphorus, potassium
The three numbers show the share of each main nutrient.
Expert level
Who invented the lawn mower in 1830?
AnswerEdwin Budding
English engineer Edwin Budding based it on a cloth-trimming machine.
Why can clover help a lawn's soil?
AnswerIts roots host bacteria that fix nitrogen
Clover partners with bacteria that turn air nitrogen into plant nutrients.
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