Repotting a larger
If you have a large brugmansia that you need to repot, or one that has been lagging in care recently, here's a way to get it back to full vigor.
1. Fill a bucket with water that has been prefilled and the super juice added. Set it aside. If you don't have the liquid foliar and feed mix, substitute for commercially available Superthrive or make your own super juice recipe here
2. Take a larger pot than the brugmansia is currently housed in, and place some good brugmansia potting soil in the bottom of the new pot.
3. Remove the brugmansia from the old pot, and place it in the new one. Fill in well all the soil around the roots, tamping it down firmly as you go along, so not to leave any air pockets.
4. Then water the pot (with regular water) the brugmansia is in thoroughly, until it runs out of the holes at the bottom. Do this several times.
5. If the soil level has dropped significantly, add more soil to the top and water again to settle.
6. Let the plant set for a few hours. Then pour the water from the bucket (that contains the super juice or Superthrive) into the pot, until it just begins to come out the bottom, then stop and reserve the remaining water.
7. Keep the repotted brugmansia in a slightly shadier area for a few days, to allow it to adapt it's roots to the new pot and perk up. Move into sunnier location as you see this occurring. Keep it moist during this process.
* Note: Brugmansia is one of those plants that you can place the original trunk growth that was at soil level below. As an example, if you want a shorter plant, bury more of the trunk below the soil level. Here is an illustration of how to do it.
Finally, if you live in zone 9 or 10, you can happily place the plant in the ground and let her grow. Zone 10 has no trouble with frost, and it will reach full height, which varies with different cultivars. Zone 9 must protect them from the light frosts that occur. A sheet usually will do this, unless a hard freeze is predicted. In that case, dig it up and move it on, or let it die back. It will rebound in spring.