Answer: Pumpkins need full sun, which means direct sun all day long or for a minimum of six hours a day including the hour of noon. So they should do better with more sun. There may be an adjustment period while their foliage adapts to the increased light. Make sure they are well watered (the soil should be evenly moist like a wrung out sponge, not sopping wet/saturated and not dried out) as they will also use more water when grown in more sun.
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