Overfertilized?-->Flushed--> Recover?

killed my last plant, think I would have learned...
Realized what a mistake I made after reading giving nutes to a young plant is like given steroids to a baby.
Did I kill my baby?

Always start with at least 1/4 strength nutes, especially if your working without a ph meter,ppm. etc.
DONT EYEBALL it, accuaracy counts, Dont want to learn the hard way ....Let me give you an example:

Mango Clone rooted in rockwool
7inches
topped low stress training for bushy plant
4.5 weeks since cloned purchased at dispensery

Environment
Secret JardinDR40
1 gallon --> 3gallon pot
Soil: Organic garden and bloome
lights: previously 230w--> now 125w 6400k 24hr schedule (too hot , fan died, increase after I get my inline fan

Temp 75-85 Humidity 20-35%
watering (1/2 tap 1/2 distilled) 2 cups of distilled h20

okay so far?


Pic #1 Monday Dec 13 Before nutes LST and topped for busher plant
watered with nutes that evening


Wed Dec 16
Yellowish green leaves, large fan leaves hardest hit and almost completely yellow
new growth looks small, sickly, leaves have claw look

Pic 2&3 Sat Dec18 Flushed, Transplanted into larger pot with new organic soil
All leaves yellow green . Removed 3 sets of leaves that looked the sickest after pic


Pic #4 Dec 20
Leaves looking less yellow green, edges of the majority of leaves regaining original green color


What exactly happen to my plant?
Will they recover, and what can I do?
this noob will thankfully take any advice!!

and I know NO MORE NUTES!!
thanks

You need to check the Ph of your soil asap.

Is it a combination of lockout (high ph) and overwatering?

I flushed and transplanted in new soil.--> would this solve the ph problem?
Roots were still white and plentiful. root ball was a bit mushy
Its prolly soaked cuz of flushing.

Going to airate soil, and be sure to not overwater. Top 2inches completely dry b4 watering. No more nutes.

Jus have to wait n see. Hopefully new growth in the following 2 weeks?

Fully flushing ALWAYS hurts the plants. It removes all of the nutrients required for healthy growth from the growing medium. When you're sure there's a toxicity in the soil, you can flush roughly halfway, rinsing some but not all of the nutrients out of the soil. The only time I reccomend a complete flush is as the last watering before harvest.

That said, the flush and transplant could definately have fixed the Ph problem. You should get a soil Ph tester and you'll always know for sure. However, Ph lockout is a cause of deficiencies, which is why the leaves turn lighter green and show other problems. Because there's been a deficiency, once the Ph is corrected, the plants will really need some nutrients.

If you're able, the best way to go is test the soil Ph and then give her a good fertilization. If the Ph is still off and is acidic, you can add lime to the fertilizer mix to help correct it further.

The soil contains dolomite which is supposed to control the ph from getting too high.

Until I have a ph tester I am afraid to give it a watering with nutes. If i do it will be a very low dilution like the one drop of superthrive per gallon of h2o. Then the solution jus once a week.

Hoping the new soil I added (on top&bottom) will give it enough food for recovery.