A photo would be helpful.

things seem to look more yellow under the grow lamps

This is the plant from my first post ( Linked at the top ) but with a better camera

Grew like crazy, and then went south in just a few hours? Not sure what's going on, but fertilizing once at half strength wouldn't cause that. Just looks like over watering to me. Get them in the ground as soon as possible.

unfortunately for my zonelast frost isn't until may 15 ish.

Now about the fertilizer. The Miracle Potting soil I transplanted these into has slow release fertilizer in it. But unaware it already had fertilizer in it, I had added some.

I'm not sure how long it takes the slow release stuff to kick in, but its been a week since i transplanted and fertilized. My thoughts were maybe the 2 together was overkill.

how long does the symptoms of over watering take to show up? Because of my last issues with over watering, I haven't watered since transplanting. Then again I drenched the soil pretty good when transplanting.

You can start worrying now...

What kind of temperatures are they being exposed to? Tell us more about the fertilizer you added, and how you got it to half strength. When you poke your finger in the soil down to 2 to 3 inches, do you feel any moisture at all? Have you exposed the plants to sun and wind? Explain how much exposure (duration) they have had.

@janice8bcharlestonsc i'm using all purpose miracle-gro plant food 24-8-16.

directions read to mix 22ml in 6 liters of water I didn't need 6 liters, only 1 liter. so 22ml/6L = 3.67ml for 1 liter then halving that 1.83ml is half strength. I actually only put 1/4tsp which is 1.23 ml cause it was the closest unit of measurement I had .

As of today, when I poke my finger in it feels damp, not wet, but not dry.

The plants only get grow lights at this time 16 hrs a day, a gentle breeze from a fan for 10 mins twice a day.

Temp of the room ranges from +22C during the day to and +18C( maybe a little less somethings) at night.

@Labradors you are from Ontario too, talk to me in liters ! :-)

Thank you to all for the help and response. I'm truly a fish out of water with gardening. I'm on the Electrical Engineering side of things for a career, and when a problem occurs i'm used to the solutions be immediate and precise. But with growing and plants in general everything is a slow burn, you don't see results or a solution immediately; which is taking some getting used to.

I think you overwatered. When I transplant , I water in. This is not a scientific term, but is what I watched my father do 40 years ago. I believe gardening is partly a cultural tradition that is passed from one generation to another. I think that is one reason the responses vary so much.

When I water in a plant, I aim for an area about 2 inches diameter with the plant in the middle. I pour some water in to drench only this small column. I want to saturate the near root zone only. Extending the drench can negatively affect the plant. It needs air too.

@janice8bcharlestonsc thanks, funny thing is about the cultural tradition is my grand parents are New Order Mennonites and I would spend summers as a kid with them in the garden. Thing is by summer time the plants were already out in the fields and established when i'd show up for summer.

Then you may know how to scout for worms and other pests. I was an expert tobacco worm locator by age eight.

When I transplant from pot to garden (theoretically I guess this could work for a large pot), I make a small pond berm to attempt to confine the water to the root zone. This seems to be a common practice. When you water after transplant you can trap the water to a small area and direct it at the root zone as opposed to it just dispersing on the surface.

While a plan is good for the garden, you have to be ready to make adjustments on the fly(agility) and after setbacks. And you need to be a good observer. Except for those like Hudson, we are taking on everything Mother Nature will spring on us, plus consequences of our own bad judgement (aka learning experiences).

I also have some engineering background, and my sisters genealogical research shows family roots across Western Europe, featuring Calvinists and Huguenots. It helps me to understand the hard work, self reliance, and efficiency as values on my great grand fathers farm. I think gardening appeals because it is challenging, and rewards self sufficiency and hard work.

I have more cages to build. And I think I just saw my nemesis in the garden, the stink bug. I understand there are beneficial that look similar, so I will be confirming and then taking appropriate action.

i think i told you in the other thread about there being fertilizer already in the mix.. i hope you had already added after i pointed that out, if you added it after then shame on you :O

this is one the reasons i avoid mixed already with fertilizer since i like to use my own. typically if you buy organic potting mixes the fertilizer tends to be a bit less concentrated for very young plants. the granular in the potting mix normally releases slow enough that it won't harm the plant, but adding more, on top of over watering will cause more release of fertilizer.

personally i'd re-pot it again if you recently did. remove as much of
the soil and replace it with just potting mix and nothing else, except maybe some more perlite. if the
mix already feels damp, feel free not to water ;)

I had already fertilized before reading your post. I face palmed for sure.

Miracle Gro potting soil, from what I can find online, has an N-P-K of less than 1-1-1. You can't have overfertilized your plants.

If the soil is damp still then just leave the plants alone for a couple more days. Be sure to check the soil itself before you water them again with some diluted fertilizer.

As soon as you can you should start getting the plants outside. Read up on how to harden them off properly beforehand. Sometimes just getting them outside can fix a lot.

Patience is needed with gardening. Things almost never turn around overnight and trying to do too much at one time to fix a problem quick can cause more harm than good.

Rodney

Update : these 2 aren't doing so hot. let the soil dry up some until they wilted. Watered with Epsom salts as direct above. While the lower leaves are pretty much dried up, the middle leaves are yellower, upward curl but hydrated. Top leaves and new growth is light green

One way to drain excess water is, after watering, tilt the pot on a 45 degree angle to the floor, this will drain the water filling the voids between mix particles.

MO, for what it's worth, my plants aren't happy under lights until I get them outside. What zone are you in? Are you having daytime temps above 50 degrees so they could be outside for a couple of hours in the sun? If you are having high temps, then they need to be in the shade of a tree to start. Then the next day a little more and keep adding time every day, with more full sun every day if in a hot area. Then put them outside overnight once the nightime temps are above high 40's. Most people say soil temps should be above 50 before transplanting out, but I don't own a thermometer for dirt...

Also, do you have a hole in the bottom to drain off excess water? I over water things all the time. Once I get them outside, they seem to settle and get even happier in the dirt. Don't give up. It takes time and patience.

Rebecca

@Rebecca In a 5B zone. it's been unseasonably warm this month, but my last frost isn't for another 2 weeks.

I planted my potatoes last week and we have possible flood warning this week. possible 50mm of rain. hope they will be ok.

Your Potatoes will love it, don't worry!! You want to get those tomatoes outside now. They should harden off for a couple weeks before planting. You can always keep them in pots outside during the day and put them in the garage at night. That's what I'm doing now and my last frost date is the same as yours. Bring them into the garage during the rain and high winds, but start exposing them to the outside. Be careful with watering when you put them outside. You need to give them enough water, but not too much. The sun and wind will make them dry out quickly. You probably want to check them daily.

Rebecca