ya you can root them in anything perlite jiffy coco... do you have a humidity dome on them they look like they drying out? and the stems look way longer than necessary...the cuttings only have to be like 3 inches total i even have had some at 1 inch root. did you put them in water after cutting while you took them from outside to your house? they could have developed an air bubble in the stem which prevents uptake of water if you didn't.