I've probably up potted about 100 or more cuttings using this method and I think it has its pros and cons.
Top 3 Pros:
1. Low chances of mold - I've discovered not a single cutting with mold using this method
2. Dense area for rooting lots of cuttings - I've packed in 20 cuttings to one shoe box
3. Maximize more plants for the amount cuttings received - Since I cut them to just a few nodes per cutting I'm getting more plants from one long cutting. However as of late I've been suffering from fig fatigue and I'm a bit burnt out on the constant up pot of new cuttings.
Top 3 Cons:
1. Lots of roots and no leaves - One thing I've discovered is that some cuttings do no leaf out. They may grow a ton of roots with no leaves, I wonder if it's because the entire cutting is under the root medium or if there isn't enough top nodes to leaf from.
2. Tangled roots - Not all cuttings will root at the same time so some cuttings will need to be up potted sooner than others. Individually pulling out cuttings that get too tangled is a bit of a hassle and can damage the roots.
3. Slower growth - Because the cutting is shorter, I've noticed that the new stems tend to be skinnier and has less vigor than a full size cutting
So to use this method successfully there are certain parameters to consider:
1. Length of cuttings need to be 3 modes or more
2. There has to be enough nodes so some can grow into rooting nodes and others can grow into leafing nodes
3. Watering a hole-less tray is a delicate matter and time consuming. I used a turkey baster to hit the growing roots
4. Duration - After 2 months if there are no roots check the tray. You may have bad cuttings or something is wrong
5. Up Potting - As soon as you see feeder roots it's time to up pot. Some leaf nodes will sometimes grow into the soil medium instead of up to the light and if you wait too long it will be more difficult to transition the new cutting to a 1 gallon
Will I continue to use this method? Yes but probably only for thicker cuttings with many nodes. So lately I've been using the bag method and it's been working out much better for me.