Filling the space between two blinds in a window

you have sheer curtains on the side. Could you add a sheer in the middle on the same rod? If you don't want the sheer to fill the middle of the window, make it only as long as the blinds hang down, if they move up and down according to the time of day you need them, make the center sheer flexible to be the same way, kind of on the idea of pulling up blinds too. That is what I would do.

I don't think you can because the blinds need that space to operate independently and will fight each other otherwise. Your best bet would be to get a new one piece blind unit. That being said and working with what you have, I can think of two other options to sort of fake it. 1. Raise your curtain bar way up to the ceiling and add a third drapery panel to cover the split in the center creating a two window look. If it looks skimpy you may want to add two drape panels in the center and extend the outside panels to cover more of the side wall area. 2. You could try to mount one of the blinds on the inside frame and the other farther out or on the outside and then camouflage the joint area. To camouflage I would raise the existing curtain rod to about 1" below the ceiling and hang a center drapery piece along the top to cover the center of the blinds and down at least 6" over the blind area to make it look intentional (valance). Again if the scale if off creating a skimpy look, extend the curtain rod out and have the outside drapes covering more wall that window.

You could do a decorative stained privacy glass strip right down the center using Gallery Glass paints and leading. You could do each corner of the big center pane of glass to tie it in.

Or

If you want to keep your wonderful view,

you could sew up a strip of matching fabric that you can Velcro to your top piece and have Velcro sewn in strips down the fabric with the opposing Velcro strip on the bottom(and elsewhere) that will allow you to drop it down in increments to suit your need.

😊

What about a flat narrow board stained the same as the window moulding? It would look like it was part of the window. and cover the gap regardless of how high or low shades are.

I would get one long wooden rod the diameter and width of the window and your hardware. Take the shades down and lay them out on the floor. take out the staples from the wood rod, transfer 2 of the hardware ends to your new rod and make sure it fits in the two outer most brackets (adjust rod length if needed). Take out the middle brackets. Now run a strip of white duct tape on the back of the two shade pieces to join them, and staple it to the top of the new rod. hang up.

Put up rod above shades & put 3 curtains on. 1 for middle & 1 on each end. The end ones push all the way to end & tie back & center one tie just enough to cover center. Shades are black then get black curtains to blend in. Good luck.