Currently in my 3rd week of veg of my first ever grow. plants took right off and were extremely healthy looking and all of a sudden growth slowed to a crawl. And the new growth seems kinda shriveled and wrinkled kinda. On a nutes, water, water schedule and water about every 3-4 days. Temps are fine, my water is 6.5 right out of the tap. I'm thinking a deficiency of some sort but can't find a strait answer. Any help would be greatly appreciated.
We need all the info on your grow including: What type of medium; soil or hydro? What brand and type of soil? Indoors or outdoors? What strain? How old are the plants? What type of lights and how many watts? How far from the lights? What is your watering frequency and source of water? What, how much and when was it fed? NPK? What is the medium/runoff pH and PPM if in hydro? What are the temps and humidity in the room? What size pots? Any bugs? Look real close. Any other pertinent info? If any of these questions have already been answered please disregard as I cut and paste this for everyone.
Medium I started it in for the first week was miracle grow, transplanted to a neutral Agro mix. That has some trace nutrients but not enough to Started on advanced nutrients sensi grow a-b 1/4 strength. Watered with that once, then 2 times regular water, drying in between each. Then half strength once, adding 1/4 strength b52 and voodoo for root stim. And then just watered again with first water after nutrients. Ph of water is 6.5-6.7 , run off is 6 give or take a point. Plants are just over 3 weeks in veg. Been lst'ing them and topped one. Definitely no bugs. Temps are 24-26 Celsius 40% humidity. They seem to really take off, the older fans are still healthy and green, just in last 3-4 days growth has slowed to a crawl, and the new growth has this shriveled kinda appearance to it.
And to add to that, they are purple kush bag seed. Lights I'm using are cfl: 2x42watt 6500k 2x23 6500k 2x23 2700
I think that your ph is too low in the soil right now. That's why the colour changed. Also think you should consider finding a micronutrient solution to give in the next week or so. The stuff you are feeding them is insufficient for the micro's.