Too many nutes in last feed...how long until I can flush? Is it necessary?

Made a newb mistake and overfertilized. Using FF Big Bloom and the back of the bottle says to use a 1/2 cup per gallon for heavy feeding (I slightly diluted it w/ an extra half gallon). I'm looking at their online feeding chart now and it says only 3TSP per gallon. What sort of schedule do other growers use? I used Grow Big in veg.

I got home and now my plant is showing (really) early stage signs of some nute burn. Namely, browning tips of fan leaves and I think one or two are starting to claw. I want to fix it fast. I've done well so far and I don't wanna mess up this late in the game.

Is a flush even necessary, or am I sweating something minor? If I need to flush, how long should I wait so the roots don't get suffocated?

Advise, tips, and input much appreciated.

I put bloom agent in a plant 2 weeks behind the plant, I over fed I could tell imedietley it was way too much, there leaves were vertical, I immediately flushed her out but ended up burning lot of leaves, if you over feed flush immediately.

I would flush with a half or quarter strength nute solution or the burn is going to show in 3 days because you are toasting the roots.

You toasted your roots when you over fed, flush out your plants use just water, then prune away those burned leaves, check ph.

It doesn't look too bad now but if you don't flush out your soil they will get worse.

Thanks guys I'll do a flush this AM

Alright, just did the flush and the upper leaves don't show any signs of advanced burn. Some of the juvenile ones low on the main stalk toasted, but it's not like they were going to do anything anyway.

Should I prune all the burnt leaves or just the bad ones?

Prune the really bad ones they won't come back, check your ph, I try and keep my ph around 6.25 to 6.50, after you prune give your plant time to recover, this is not advice but I only feed my autos base, botanacare pro, beacuse I don't cut corners on my medium I see no reason to feed anything more than base, all i want is my auto to top off and be in full flower, this happens between day 50 and 60, with good medium, and good base I never burned an autoflower in veg, after my plant is ready, I flush out all the base, add botanacare pro flower base and Atami bloombastic and put my autos under a bloom light, this will give your flower structure, here is a pic of nl at day 37.

Prune the really bad ones they won't come back, check your ph, I try and keep my ph around 6.25 to 6.50, after you prune give your plant time to recover, this is not advice but I only feed my autos base, botanacare pro, beacuse I don't cut corners on my medium I see no reason to feed anything more than base, all i want is my auto to top off and be in full flower, this happens between day 50 and 60, with good medium, and good base I never burned an autoflower in veg, after my plant is ready, I flush out all the base, add botanacare pro flower base and Atami bloombastic and put my autos under a bloom light, this will give your flower structure, here is a pic of nl at day 37.

I'm sorry bout that, first pic is grapefruit auto by fast buds just before I chopped right on time at day 74, note health of plant, note the bud structure, this is how I run autos, I have 2 NL I'm running 1 outgrew her space and is now a free range plant, my other one is a bear but still under lights I should have topped the big one but it was allready in pre flower, don't forget I'm going to run these in veg for another 23 days.