Well, depending upon your plant size, just place a big cardboard box over the plant. Make sure its light tight.

I dont know what you hope to accomplish by window ledge light 3X week.

have any pics of what you;re growing?
HARDDON Reviewed by HARDDON on . keep plants dark whats the best way to keep all light away from plants in the 12 hour dark period for flowering?? what kind of methods do yous experienced growers use?? could i just put the flower inside a cardboard box and seal it up and leave just a couple of small air holes or something for nighttime and then take it out in the morning and put it back under the light for 12 hours??? :) Rating: 5