The plant clinic provides a place and time for people to bring in samples of plants for diagnosis including weeds for identification.
Bring a fresh sample of the weed, plant, insect, etc., that you’d like diagnosed to the clinic. This may include a plant stem with several leaves, a 4-inch square of grass with roots attached, etc.
You also may bring a sample of soil for pH testing. Use a clean shovel, trowel or soil probe to collect a representative sample by taking thin slices or cores of soil to a depth of six to eight inches from ten different spots throughout the plant bed, lawn or garden. Thoroughly mix all of the small soil slices/cores together in a clean bucket. Place one to two cups of this mixture in a closable plastic bag and bring to the clinic for testing.
Larry Williams, UF/IFAS Extension Agent, Okaloosa County, September 1, 2016