Thursday, May 13, 2021

Sun tracking (times it arrives and leaves the yard); only 3.5 hours direct sun!

 Thursday May 13th 2021

  • Sun arrives:
    • 9:40am sun arrives at west edge of yard
    • 10:55am arrives at east edge of trays (ie trays fully lit) placed on chair/table in their normal position
    • 12:00pm arrives at west edge of bottom step
    • 12:10pm bottom step fully lit
    • 12:20pm top step fully lit (--> since shade on top step by 3:40pm, = only 3.5 hours of direct sun!)
    • 12:20pm MAXIMUM AMOUNT OF YARD IS IN FULL SUN BRIEFLY (essentially whole yard just not quit the margin)
  • Shade arrives:
    • 12:15pm SHADE arrives a west edge of yard
    • 12:30pm 16”of shade
    • 1:00pm 56” of shade
    • 1:15pm 72” of shade  --> So, the line moves at 72” per hour (that’s more than 1” per minute!) or 6 feet/hour
    • 1:30pm:  I can move chair into west bed in front of peas and be in shade
    • 1:45pm:  shade has reached west edge of patio stones
    • 2:10pm:  shade has reached west edge of second row of patio stones, so about half an hour per patio stone.
    • 3:40pm:  full yard is back in shade
So, the yard gets only 3.5 hours of direct sun in any one spot!  And yet a vast array of vegetables do fine here.  (Peppers an exception.)

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