hmm... not really. usually, cutting with leave won't have serious issue in the baggie for awhile. however, with high humidity and the temp, it will turn mushy sooner or later. the question is how long before that happens. 18 days aren't too long. usually if i don't see any response from the cutting in 4 weeks, i'll move them to cup. if the leaves are sitting in water or collecting water, i would consider moving also. if they are not running into any issue, i would leave it in the box and monitor.