OK. Here's a tip that will help you tremendously. So take it.
Stop taking marketing names as gospel. Names like Recharge,
Bud Candy and shit are meant to sell, not help you. While some may have a good rep, that's only because the growers know something else. What do they know about? Start reading about NPK, Mobile and Immobile nutrients, and how to feed your soil (not the plants). You can easily do this while they're seedlings. It's really not that hard. Especially with google and youtube at your fingertips. I guarantee you'll learn something every day (take notes and save bookmarks!)
On your plants:
There is no magic bullet. You can't fix a damaged or dead leaf. (Using Recharge isn't recharging a plant, it's recharging the biology in your soil.) Once a leaf is damaged, it's toast. But you *can fix new growth. In your case, the new growth is stopping. Most times there's something to gain in it's death. In your case, like several people said already, take a clone. That's because it's your only hope Ben Kenobi. Take the clones while the leaves on the tips of the branches are still alive.
A Plant's Only Reason To Live, is To Reproduce
Among other things, when a plant's roots start dying, is thirsty, or starving of nutrients, it starts cannibalizing itself in an effort to first feed the top new growth, then flowers, then fruit.
With corn, a lack of moisture or/and nutrient deficiencies causes the corn plant to cannibalize itself, starting at the bottom first, to ensure the ear has everything it needs. But this leads to root rot, that leads to premature death.
This is exactly what has happened to your weed plants.
WHEN YOU START OVER
1. Water consistently, but not every day. Over watering will drown and kill your roots. Lift your pot before you water and notice the weight, then after you've watered it. You'll know right away if you need to water it again. Trust me on this.
2. If you using supersoil, you don't need to feed. Just water start to finish.
3. If you feed, only feed once a week according to the label. This is what happens when you don't measure your fertilizer.
4. Start your seedlings in small pots. As they grow, transplant them into progressively bigger pots.
These are in 4 inch pots. They're goin into 5 gallon pots today.
(These seedlings are in a tray because I water from the bottom. I add a half inch of water to the tray and let the soil wick up the water.)
Roots coming out the bottom of the pots tells me it's safe to transplant.
Once the roots populate the 5 gallon pots, they'll go into their final 20 gallon pots.
If I want to control the size of the plants, I keep them in 5 gallon pots, but they'll need to be watered and fed a little more
(not a lot more) as the roots completely fill the pot. I'll keep an eye on the bottom leaves for sings of yellowing. If they start yellowing, I'll up the feed a bit. I'll flip them to flower early because they'll almost double in size.
BTW, these are Platinum Cookies and they'll move to 3 gallon pots and will be flowered a week later. I'm doing a female seed run with them so they don't have to be big to produce hundreds of seeds (sometimes thousands).