To propagate basil, cut about a 3-4 inch stem of new growth just above two leaf nodes:
Give the cut base plant a good watering so it can start to regenerate itself.
Prepare your cutting by gently removing the lower leaves on the stem, leaving the two smallest at the top:
Then place in a dish of fresh water by the windowsill to sit. Over the next several days, keep the water in the dish fresh and covering the stem of the cutting.
After a week in the water (right around 7-8 days), we began to see our stem already sprouting new roots:
They just sprung right out from the base of the stem:
It's now been 2 weeks since we took the cutting and the roots have continued to grow. We'll continue to let them grow and establish longer and thicker roots before planting it in soil, but this is where we are today:
Pretty amazing, right?
Here's how the mother basil plant is fairing since the cut we made:
As you can see, since we cut just above two leaf nodes, the small plant generated two new stems with leaves, creating a bushier plant:
As each of these stems continue to grow longer and stronger, we'll be able to take new cuttings from each. This will allow us to get more basil started, while keeping the mother plant full and bushy instead of tall sparse. This cycle can go on and on, providing you with lasting basil all season long.
We'll keep you posted with how it goes for us. Have you had success regenerating basil or other plants — what methods seem fail proof for you?