Q.When Liquid Fertilizing Plants In A Pot Should You Water the Plant After Fertilising Or Before?
Does this method differ for plants in the ground?

Certified GKH Gardening Expert
You will be watering -with- the fertilization. Make sure to follow all packaging instructions regarding use. Usually, you will mix in a certain amount per gallon, or liter, whichever applies to you.
Application rates will be dependent on the type of fertilizers that you choose, as well as the specific type of plant.
Always make sure to water only after the ground dries fully, down to 3 or 4 inches, outdoors, and 2 and 3 inches, indoors. This will prevent root rot, or other issues.
Watering times will differ based on climate, and humidity around the area. It is best to measure by hand, or with a meter until you get comfortable with watering habits of your plants.
These articles will help: https://www.gardeningknowhow.com/category/garden-how-to/soil-fertilizers
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/best-times-to-apply-fertilizer.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/what-is-balanced-fertilizer.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/what-is-foliar-spray.htm
https://www.gardeningknowhow.com/houseplants/hpgen/watering-your-houseplants-properly.htm
https://www.gardeningknowhow.com/edible/vegetables/vgen/water-plants-vegetable-garden.htm