What type of medium; soil or hydro? Soil What brand and type of soil? Fox farm ocean forest w/ 25% perlite mixed in Indoors or outdoors? Indoors What strain? Kalashnikova How old are the plants? 27 days from seed What type of lights and how many watts? 600w HPS How far from the lights? 20-24" What is your watering frequency and source of water? Every 5-6 days very hard well water that smells like sulfur. What, how much and when was it fed? NPK? have only fed 2x first time 1/2 strength fox farm big bloom only, 2nd feeding was last week 1/4 strength grow big and big bloom. What are the temps and humidity in the room? between 60-80 F with 35-50% RH What size pots? 3 gallon containers Any bugs? Look real close. There are a small number of fungus gnats, plan on foliar spraying neem oil on day 30. i have a few plants that are showing some weird discolorations and some of the lower leaves are drying out, yellowing and dying (im assuming since they dont get much light below the plant?). The 1st picture shows some of the mid leaves discoloring and one becoming yellow and crispy below it. The 2nd picture is the worst plant of all i believe it has had strange colors for the longest and just looks generally the least healthy.. maybe a bad seed? im not sure. The 3rd picture is just to show what the others look like in comparison, most do look much healthier. Any help is much appreciated!
You will have to removed those two plants, they appear to have a virus. None of them is showing a deficiency, the discoloration is what a plant with a cold looks like....interesting that it hasn't spread to the others, they usually do. You likely got seed with the virus. Wash the container in hot soapy water, rinse and bleach, then rinse and dry it. It's reusable, the soil with the viral plant is not.