gardenias

Question

my newly planted, once green and lively gardenia bushes have become brown.
I watered them with the vinegar water method about 6 days ago.

also I planted 3 snapdragon plants all in the same area 2 are thriving and 1 is dying

HELP

Answer 1

For what reason were you using vinegar?
This is not a recommended way to water either Gardenia or Snapdragons.
These links will refresh you on the care needed for both of your plants.
https://www.gardeningknowhow.com/ornamental/flowers/gardenia/gardenia-plant.htm
https://www.gardeningknowhow.com/ornamental/flowers/snapdragon/growing-snapdragon.htm