Home Improvement
I'd like to know if there is something I can do to close the gap or hide the gap in the blinds. Obviously, I can measure properly and purchase new ones but really trying to avoid that.
I've also thought about curtains, but it's also something I'd like to avoid. Are there any solutions to this?
Here is another photo zoomed out. 
Duct tape
Go to CVS. Buy one item. Hang receipt to cover gap.
You could put a taller, bushier plant right in the middle. Or get one of those old privacy screens folded up a bit.
Buy one more set of blinds 3" wide and hang it in between these two. Just ask for "mini blinds" at your local big box store and they'll put you on the right track.
I had the same problem - the correct size blinds I bought were broken and had to return them and could only get a set that was 1 inch shorter 😠
Ended up moving the mounts slightly inward so the gaps were on the edges. The two smaller gaps on the sides were a lot less noticeable than the gap in the middle. Also ended up putting curtains up to cover the edge gaps, though it wasn't strictly necessary. I keep them pulled to the side, and they're purely decorative / to hide the edge gaps.
Moving it inward may be the way to go...
Definnetly get those mounts butt up against each other. Depending on what hardware is up in the blind track ( and it looks like the where set right with the adjusters to the outside ) you may be able to take a hack saw and trim the track just slightly like even a 1/16th off each end will end up getting that gap down an 1/8. Etc etc. Or you may be able to find a center style mount for a long single blind set up. And get the two ends in there instead of two end caps. It seems excessive BC there will always be some small gap.
Get braces.
Haha, I chuckled
curtains are the solution even if you are trying to avoid it. curtains help soften the corners of the windows, too.
Or two more large plants and center them around the gap.
I have a "center curtain" for this very reason. Depends on how much it hurts your soul to basically turn one window into two smaller windows.
You could try applying something to the actual window, like a fake wooden "pane split" whatever the real name for that is. Put one on the inside and the outside, so it doesn't look weird. Just make sure the wood is weather proofed. Even the inside one will likely see decent humidity and moisture some seasons.
https://www.thistothat.com/cgi-bin/glue.cgi?lang=en&this=Wood&that=Glass
Options for the right adhesive.
Measure the height, and buy a length of some narrow, white board at Lowe's Depot. Stick it onto the glass with a small amount of double-sided tape.
I think some stores sell pre-painted trim boards. Or even solid white plastic ones.
I mean, how much work do you feel like doing? If I were in your shoes the nicest way to make those two blinds in that position work I think would be to extend the individual slats. Easiest would be cutting paperboard down to size and taping it on, but I'd 3d print pieces that clip on and match the blind color to make them less noticeable.
attached a vertical piece in front of the gap?
A more complete picture would help, but my approach would be to move the blinds closer together, then fill any exposure that then occurs on the perimeter with something the same shade as either the wall or the blinds. (Or as someone else said, curtains that are always pulled back).
Rant: Blind mount brackets should be slotted, and come with pancake-head screws. There's no way in hell to get the screws exactly where you need them (and I'm meticulous, drill pilot holes, etc). Mine are always near perfect, but the lack of slots makes it much harder than it should be.
I've thought about moving them closer. I can do it without issue - I suppose I can try it out and see how it looks.
You can also add sheer curtains in front of them if light is coming through. I find blinds alone are never enough.
Purchase one, not two sets.
The two will always need a tiny little space between them in order to move independently.
Or place a vertical beam behind the gap :)
Glue a strip of material to the backside of each fin to extend coverage.
It won’t looks great.
Most places I've ordered blinds for will allow you to reorder a different measurement, up to a lifetime cap (like 4 times per person/household - you only get to fuck up for free so many times). The one I messed up they just let me keep because it was a custom size (still in my garage for some reason)
It's a pain but it is the way to go if you want your blinds to really be good for the space.
Only time I've been annoyed was a cloth roller blind I ordered to cover a large door window that I measured perfectly but nowhere in the description did it say that there was a 1/8 gap at each edge and the overall width of the blind was 1/4" shy of your measurement. Returned that one and just got a bigger one where the blind was the actual width I wanted...
Tall vase or a plant on the window sill?