Is it ok to cover plants a couple hours before sunset and uncover them once it's dark out, or do they have to be actually covered the whole 12 hours?

What are some problems with doing this, i.e. -air flow, materials resting on or touching the plant? Any success covering for a week or two and then letting nature take place.
dimondmyne Reviewed by dimondmyne on . Covering plants at night Is it ok to cover plants a couple hours before sunset and uncover them once it's dark out, or do they have to be actually covered the whole 12 hours? What are some problems with doing this, i.e. -air flow, materials resting on or touching the plant? Any success covering for a week or two and then letting nature take place. Rating: 5