Nichole,
Here's something you can use against sunlight in your plant window.
I use the "cracked ice" style acrylic ceiling panels 24" X 48".
The kind that is used under flouressent lights in a drop down ceiling.
When sunlight shines through the panel, it diffuses sunlight so it doesn't burn plants. But, still lets in A LOT of light. I used to grow Phalaenopsis,(low light plants) and Cattleya orchids (high light plants) together in a southern window using these panels. The sun never burned any of my plants, and they grew together in the same window like mad.
The panels also double as linsulation for your windows against heat, and cold. So the plants can sit right against them without burning, or frostbite. Excellent for window privacy too, even at night.
So, No shades/curtains to remember to open, and close daily.
You can also cut them to size with heavy shears. or a box cutter, and metal ruler (Tape around the edges of the panel first, they are somewhat brittle to work with) I put the panels right against the window and hold them in place with invisible/clear packing/postage tape around the edges. they look like real glass when installed properly, and fools everyone that's seen mine. They retail at Lowe's here where I live for about $4.79 per panel in the window dept.
I believe if the panels were thicker, they would make the perfect greenhouse cover, no shading would be needed. I'll bet It would probably work for the inside of a window paned greenhouse.
Good luck with your new cuttings!
Dan~