What zone are you in? Also yellowing of the leaves, overwatering, nitrogen deficiency, or magnesium deficiency. Every two to three days a week is too much water. Looking at your mix it's bark heavy which is like a mulch so you probably don't need to water that often. I am leaning toward too much water rather than a nutrient deficiency.

Thanks for your response. I will try that.

Showing typical symptoms of low-nitrogen -- yellow lower leaves, green new growth.

Bottom line: They need nitrogen.

Why are you opposed to using fertilizer?

What are your high/low temps like? Where are you located? Peppers like their roots on the warmer side and will literally sit and sulk if the soil is too cold for their liking.

I am on the temps bandwagon. I am guessing you are in an area that is still cool at night and struggling to hit 70's or 80's during the day. If it is lower than 50 at night, your peppers are just going to go dormant until things warm up. Are the peppers getting a lot of unfiltered sun?

They are getting full sun. The only issue is the temp. I'm still not getting that constant exposure to heat.

That will do it. When you get to a point where you are hitting 80 plus during the day and stay above 60 at night, they will take off. Where are you at anyway?

Houston, Texas

Well, heck, you should be in good shape real soon. I suspect all that rain you have been having has something to do with it as well. Peppers don't like wet shoes.

It looks like you have a hoop frame, why not stretch some clear plastic over it and make it a hoop house? That will keep the soil warmer at night, as long as you are careful to pull the plastic open or off during the day so you don't trap too much heat.

That's a great idea.

Thank for the input y'all.

If you are watering 2-3 days a week I would say your primary problem is probably overwatering. Is there extreme heat and drought?

He is in Houston Tx and they have beeen having massive rains and flooding so yah, it is probably an issue with too much moisture. Especially if he is still watering.

Give it some time and a little less water (for now) and those peppers will soar once the heat and humidity rise. I have a small serrano pepper plant in the backyard and I live in Missouri, it's been pretty chilly so far even with an abundance of sunlight, but I'm looking forward to May and warmer weather and (hopefully) homemade salsa!