Cost of Watering
Deciding recently to consider the cost of watering one pumpkin plant, I came
up with the following calculations. 50 gallons per day over 120 days is
6,000 gallons. If an average house pump only put out 2 gallons per minute
through a garden hose, then each day the water will run for 25 minutes to
pump 50 gallons. For a 120 day growing season, that is 3,000 minutes (same
as 50 hours) at 1/2 horsepower (same as 373 watts) for 18.65 Kilowatt Hours
at $0.12 per KW or $2.24. So the cost of watering from a well is really not
as bad as I originally thought. Understandably, this may run higher with
the start up draw on a 1/2 horsepower pump almost tripling briefly. Even so
spending $2.24 to pump 6,000 gallons sounds cheap. Anyone care to
reevaluate these calculations?
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