PLEASE HELP LAST 3WEEKS FLOWERING!!! Possible mag def?

Strain: Delicious Seeds Cotton Candy 75% Sativa 25% Indica
UFO 90W LED
Temps stay between 76-82 RH stays around 45-50%
FFOF Organic Soil. Also used FF Grow Big during veg, and now using Tiger Bloom at 2tsp every other watering. Had a mag deficiency at the beginning of flowering gave it a little Epsom salt in watering as well as foliar spraying and it solved the problem. Always water with tap with a pH of around 6.5. Using General Hydroponics water pH tester solution so its difficult to get a very precise pH reading.
Vegged for 2 months. 7 Weeks into Flowering. This is a 10 Week flowering strain! Was planing on flowering for a full 70 days. 3 More weeks remaining! I was going to start my 2 week flush next week.
Is this another magnesium deficiency? or iron? is this normal during this time? I just purchased some organic blackstrap molasses that has 8% mag and 15% iron per tbsp and was planing on starting to supplement with this for the next 2 weeks 1 tspn per gallon every watering. and a full 1 week plain water flush for the last week. Should i add some Epsom salt? It was looking great and dark green up until last week. It seems like its been progressing over the past week and getting worse. Please help me!! Needs a watering today...Thanks so much in advance

Have you ever flushed, potted plants can get saltbuild up pretty quick, causin all kinds of problems..if I remember tigerbloom is pretty loaded wih everything except enought N

Bublonichronic said:

Have you ever flushed, potted plants can get saltbuild up pretty quick, causin all kinds of problems..if I remember tigerbloom is pretty loaded wih everything except enought N

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i water with plain pH'ed water every other watering. I have never given more than a gallon of water at a time. I still get plenty of runoff with a gallon.

I would look into the run off ph. If you havent flushed this entire grow I would agree lockout is happening. Also remember first 7 days of 12/12 dont count for your flower time so day 1 flower is actually first day of second week in 12/12. The molasses should be started around week 3 of flower generally 2 tablespoons per gallon. Make sure its Unsulphered such as Grandmas Black Strap Unsulphured. When you decide to do the actual last flush its nothing but pure water no additives and I would do it like the last 7-10 before harvest. When you flush make sure to flood the pots well then let them almost dry out before adding a nute regimine again. Last flush just let them dry up more or less then harvest.

FilthyFletch said:

I would look into the run off ph. If you havent flushed this entire grow I would agree lockout is happening. Also remember first 7 days of 12/12 dont count for your flower time so day 1 flower is actually first day of second week in 12/12. The molasses should be started around week 3 of flower generally 2 tablespoons per gallon. Make sure its Unsulphered such as Grandmas Black Strap Unsulphured. When you decide to do the actual last flush its nothing but pure water no additives and I would do it like the last 7-10 before harvest. When you flush make sure to flood the pots well then let them almost dry out before adding a nute regimine again. Last flush just let them dry up more or less then harvest.

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If thats the case then I still have 4 weeks left. How much should i flush with in a 5 gallon pot? What should the runoff ph be? around 6.5? if its anything less or more should i flush with ph'ed water? I bought wholesome sweetners Organic Blackstrap unsulfered mollasses. would it be to late to start using now for 2 week? So what your saying is just flush with ph'ed water today then give nutes next watering? wouldnt the leaves continue to get worse until the next watering with nutes?

looks like the cannabis plants doing it's natural thing. Taking the food from the leafs before it dies.

10 gallons flush for a 5 gallon pot? isnt that going to drown the roots? should i use pH'ed tap or distilled water? idk where i can store 10 gallons of water..please guys

You might be able to get away with less water for flush, maybe 2-3 gallons for a 5 gal pot, just use tap water, or if u have shitty water u can mix distilled n tap water, I say get a RO filter tho If ur gonna be using distilled

whats the problem ? those plants look very very good. leaves are normal to look ugly in later flower. every body thinks they should have a green plant all the way through this is not soo . if you want them green and very healthy looking don't flower them. keep doing what your doing until your ready to start your flush

kinddiesel said:

whats the problem ? those plants look very very good. leaves are normal to look ugly in later flower. every body thinks they should have a green plant all the way through this is not soo . if you want them green and very healthy looking don't flower them. keep doing what your doing until your ready to start your flush

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so you think it looks normal? even though i still have 3-4 weeks of flowering left. and im still giving nutes? i would expect it to start looking like this during my 2 week flush before harvest... but its still getting nutes thought it'll stay a nice green color....i will check the ph of my runoff. if it is completly off. i will flush with 3 gallons. last gallon include a teaspoon of molasses...these leaves look like they will fall off within the next week

so i gave it a 3 gallon flush with 6.5 pH'ed water...i got a sample of the final runoff and the pH was between 4 and 5..i gave it another gallon of the ph'ed water and it stayed the same. so i gave it 4 gallons of 7.5 tap water and it bumped up to 5. gave it another 3 gallons of 7.5 tap water now its still on 5.0. what can i do to get it around 6.-6.5

Leave it alone all your doing right now is halting your flowering process leave that shot alone you only have a few weeks bro

You have flooded your root zone with all that water so it's gonna be all droopy and shit now. It's to late for the molasses in my opinion. Just let it finish at this point you shouldn't have to water for a week so that leaves you one nutrient watering and your 2 weeks flush then let it dry up and harvest. Until then you need to be sitting back watching her finish swelling. Kinddiesel said it best. Just look at some other flowering plants and tell me if leaves are falling off.

shhady said:

10 gallons flush for a 5 gallon pot? isnt that going to drown the roots? should i use pH'ed tap or distilled water? idk where i can store 10 gallons of water..please guys

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flush with 15 gallons of water as you need to get 3 times the amount of the pot through

and also just flush with the PH'ed level you are aiming for, run off will eventually be what your aiming for

shhady said:

so you think it looks normal? even though i still have 3-4 weeks of flowering left. and im still giving nutes? i would expect it to start looking like this during my 2 week flush before harvest... but its still getting nutes thought it'll stay a nice green color....i will check the ph of my runoff. if it is completly off. i will flush with 3 gallons. last gallon include a teaspoon of molasses...these leaves look like they will fall off within the next week

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You do not have 3 to 4 weeks left of flower..you might have a week and a half until if finish's.The leaves are drawing down to their natural fall colors and going into the finish stage.This is the stage they will harden and ripen for finish.

I never thought runoff was a great way to check medium pH, prolly best to just chill now since u gave so much water and maybe feed next time they need water..but don't worry bout drowning ur roots with a flush as long as you let them dry out..

Looks great to me man! It is fairly normal to see some yellowing and dropping off of leaves during the end of flower. Some plants will stay green all the way through though. I doubt it is anything to get worried about. Just my 2 cents! Good luck with your harvest! I have had 1 of these Cotton Candy seeds for a while now that I got as a freebie that I just haven't popped yet. I just hadn't seen much about it, but yours looks great! How is the smell on that bad girl?

shhady said:

...... and now using Tiger Bloom at 2tsp every other watering.

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Ouch! Get back to a more balanced NPK food and shit can that damn bloom food. It's causing premature leaf drop and leaf chlorosis. https://www.rollitup.org/marijuana-plant-problems/158144-never-ending-abuse-phosphorous-bloom.html

These damn plant food manufacturers have your money, not your back.

DO NOT flush your plants before harvest. Keep the leaves healthy and green. I would finish this plant with a food like MG 24-8-16. Yes, you read that right. That's what it needs.

UB

Uncle Ben said:

Ouch! Get back to a more balanced NPK food and shit can that damn bloom food. It's causing premature leaf drop and leaf chlorosis. https://www.rollitup.org/marijuana-plant-problems/158144-never-ending-abuse-phosphorous-bloom.html

These damn plant food manufacturers have your money, not your back.

DO NOT flush your plants before harvest. Keep the leaves healthy and green. I would finish this plant with a food like MG 24-8-16. Yes, you read that right. That's what it needs.

UB

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"24-8-16" Dumb question Uncle Ben......how is this different than 3-1-2?