How long is too long to keep a clone w/o it rooting?

I have several clones that I took slightly less than a month ago, that still have no sign of rooting yet? They are otherwise healthy, unwilted, and green. So how long do you let a clone sit and take care of it before you toss it??? Or just keep going as long as it looks healthy?????

How do you know it's not rooted.. Where is it in that picture..in soil I'm assuming

I would assume until it dies...

They aren't rooted because they aren't growing, and there are no roots at the bottom. Sometimes I give them a gentle "tug" to see if I feel anything, or i'll unbury a bit the stem to see if its been a long time. And yes, in that picture is my Veg/Mom/Clones. And yes its in soil. I tried Coco coir but it wasn't much better... At some point I will invest in a cloner but I don't got a whole lot of room my Veg box is 2x2x2 118w CFL. I gave my 150HPS to my friends because it just doesn't work in the 2x2x2 setup I wanted.

Oh and BTW, some the clones taken the same day, are in my flowering chamber already, and hitting almost 3 weeks (I throw my clones in flowering after vegging for only a week due to height in there... so at 5 to 6 inches theyre in flowering, SOG style)

ive no experince in the field of clines but i did hear of some experinced grower keeping the mother(keeper) in veg for 2 years without it negatively effecting any clones which are taken off it.

As long as they're green, there's hope.

PS - Stop tugging/digging them up.

Good luck

ive always tugged on them, been cloning for a while just never had it take that long. funny thing is next day after I posted this.... they like burst into rooting out of no where... they just were taking their time I guess