There are many ways to root a twig. And yes, you sure can skip the baggie and/or water steps for initial root formation and root them straight into whatever material you want.....including potting soil, potting mix, peat moss, spag moss, perlite, vermiculite, sand, regular dirt, etc. etc. etc. You will lose some level of control during rooting under those conditions......and that is perfectly fine for many people. However, I like to "optimize" the rooting conditions and rooting parameters that are within my control to insure a higher success rate. When I have a rare cutting or a limited amount of wood, I want to use a very simple, almost foolproof, and very reliable rooting method.......that is what I am working on. Most people are quite happy with a 60% success rate (as measured by actual "trees" that are ready to be planted into the ground)......I am not satisfied with that success rate. I want 100%.......and IMO, that definitely is possible whenever you have a source of good quality cuttings to begin with.
This particular "Peat Pot Method" eliminates the root shock that often occurs whenever you move your cuttings from their rooting cups and into their final larger container. IMO, this is a breakthrough technique and WILL SAVE a lot of cuttings from dying from transplant root shock. There are other advantages to using this particular technique that I will not get into. IMO, it is a VERY GOOD rooting technique.
FYI..........I am now rooting actively growing SUMMER fig cuttings and not dormant "winter" cuttings. There is a difference and the choice of rooting method can vary. All will be clear when I post those pictures that I am now taking. As I just recently stated in another thread, IMO Clonex rooting gel MIGHT BE beneficial (don't know for certain yet) for rooting "SUMMER" cuttings. I saw no advantage to using it for winter dormant cuttings. There are very good scientific reasons why it might work better for summer cuttings than it does for those dormant winter cuttings. I am experimenting with this as I type this info. More later.........
Right now my personal preference for rooting winter dormant cuttings still remains starting in baggies and/or water just until roots initials form....then place them in rooting cups (with peat pots where deemed appropriate). That personal preference may change based on some of what I am now seeing. I do not want to go into any more details until I post pictures....
Also FYI........a very reliable SUMMER cutting rooting method is very very important to me in my fig research activities. I am an ardent and determined fig hunter who finds most of his new heirloom figs during the summer months when the fig trees are fruiting. I want to take cuttings whenever I find a promising tree and do not want to have to go back months later to take winter cuttings. Besides summer cuttings ARE MUCH EASIER TO ROOT and much less problematic. Much more on all of this later.........
Dan
Semper Fi-cus