Answer: Based on your description I suspect it has been "resting" for winter due to lower light levels. This plant is almost a cross between a vine and a shrub so it tends to be leggy as a container plant. You might try pruning it back annually in late winter or early spring to try to keep it dense and bushy. It will take a few months after that to regrow and begin blooming again but as a container plant it does need some regular trimming to keep it in shape. You may also need to repot it into fresh potting mix if you have had it for a long time. It also needs regular fertilizing when it is in active growth from spring through fall. Use a water soluble fertilizer with an analyisis of 10-10-10 plus minors per the label instructions.
Layering can take several months or longer, it depends partly on what time of year you started it. Wounding the stem where it is underground can help speed things along, and warmer temperatures are also very helpful. In my experience it roots faster during summer. It is a good idea to set the layer into a little container of its own so you can see when roots begin to show at the bottom of the pot. Otherwise, wait until the layered portion has been in active growth for several months, then make sure you are not able to pull it out of the soil, then go ahead and separate it.
Good luck with your jasmine!
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