does flushing cause stress?

havent tried aero. is it basically misting the roots in the res? quicker than hydro too you say?

hey, I just realized the whole problem here. You greenman were so general about your question that didnt know if you meant flushing before harvest or flushing in general.

stupid me I thought you meant flushing before harvest as everyone flushes during veg/flower. than me and my mate got into it a bit which is my fault b/c I would have agreed with him had I known you meant not before harvest. but now you provide the necessary info to really answer your question, so this is all your fault,lol.

ok im alright with that sry lol. so what would you say to do???

ok, so you are in day 25 of flower and you are having nute issues. do you have pics? that would be the most helpful. if not,
couple of questions
age
soil have nutes in it?
height
size of pot
what nutes are you feeding and what are the ratios of NPK
did you change her feeding from veg to flower
what is water/feed schedule
lights, temps, humidity,
tap water or distilled
are you ph'ing the water

age would be about 2 1/2 to 3 months. i used mg grow organic no nutes in the soil.it is in about a 10 gal storage container, the plant is about 21" tall. for veg i used 20-20-20, then for flower i was using FF open sesame. i water when the soil is dry about 2" down. im flowering w/ a 400W hps. temps in the day are about 75 and night gets down to about 60. i use tap water that i leave out for a few days, the PH is 7 for the water out of tap.

let me know if u need any other info thnx for helpin to. as far as pics the ole girl doesnt want me posting em sry.

have you been feeding her with that veg formual with the ff open seasame or just the ff open seasame.

since flowering i have just been using the FF but when i flushed the first time i added the 20-20-20 at 1/4 strength with the last gal of water, because i had nitrogen def but what i didnt think of, or realize was that i had nute burn from the FF that has very low N

I dont think you would get nute burn unless you gave her 2-3 times the reco dosage. if anything she needs more of the veg nutes. you wont get burned by just using flowering nutes. you want to keep using veg nutes until all of the bud sites have grown in. than you can switch to flower nutes if you have sufficient green fan leaves.
sounds like she is hungry-give her 1/4 strength of veg nutes. really hard to tell without pics

the tips of all the leaves including the small ones are curled over just like in this post

https://www.rollitup.org/general-marijuana-growing/130305-tips-leaves-curling.html

a million things can cause that-heat stress, humidity, nute burn, nute def. if that is all it is I wouldnt worry too much about it unless the tip back starts to die. than it could be a million other things

oh yeah on about all leaves the tips are brown and dying just the very tips, and some little brown spots. on all execpt very very new leaves about an inch long.

Summary:

Preharvest flushing puts the plant(s) under serious stress. The plant has to deal with nutrient deficiencies in a very important part of its cycle. Strong changes in the amount of dissolved substances in the root-zone stress the roots, possibly to the point of direct physical damage to them. Many immobile elements are no more available for further metabolic processes. We are loosing the fan leaves and damage will show likely on new growth as well.

The grower should react in an educated way to the plant needs. Excessive, deficient or unbalanced levels should be avoided regardless the nutrient source. Nutrient levels should be gradually adjusted to the lesser needs in later flowering. Stress factors should be limited as far as possible. If that is accomplished throughout the entire life cycle, there shouldn’t be any excessive nutrient compounds in the plants tissue. It doesn’t sound likely to the author that you can correct growing errors (significant lower mobile nutrient compound levels) with preharvest flushing.

Drying and curing (when done right) on the other hand have proved (In many studies) to have a major impact on taste and flavour, by breaking down chlorophylls and converting starches into sugars. Most attributes blamed on unflushed buds may be the result of unbalanced nutrition and/or overfert and unproper drying/curing."

https://www.rollitup.org/t/the-truth-about-flushing.409622/

smokeybandit22 said:

lets see if I got this straight...if your plant has had ph issues, nute lockouts, nuteburn ect, and most of your fans are already yellowed and basically fried up like so so many I have seen here on RIU, than your plant would suffer no stress even though it has no leaves to take from for reserves to finish it's life cycle? and a plant in flowering concentrating on bud growth needs no nutes at all?
seems unlikely.
In the event this is not the case, than I agree.

Click to expand...

Good one!

Flushing as in flooding your plant with say 15 gal of water for a 5 gal pot in one watering, does stress your plant.