Hey folks! I'd caution against making huge generalizations like this "sun tip",
Eg. 6 hours of full sun in June? or in March? Very different. Full sun in California or in cities where there is so much air pollution? Very different than a place with clean air.
Also 6 hours of full sun in Florida at any time of year is a whole lot more solar energy than 6 hours of full sun in Wisconsin or Washington state. How about Alaska and Canada? Tomatoes grown in southern British Columbia are the sweetest on earth because they get 9 hours or more of sun per day at the height of summer. So, 9 hours might be defined as "full sun" up there. But the sun is more intense in Texas so maybe 4 or 5 hours is "full sun" in the lower latitudes?
Lots of things I plant down here that say "Full sun" on the label really need shade in the middle of the day in summer to grow nicely - or in some cases even survive.
