What happend someone help please thanx

[sanjose]

ok this is a question about my last grow i had grown four purple kush clones in dwc using advanced nutes big bud bud candy sensi a and b 2 came out top knotch and the other 2 came out like shit i was just expermenting to see what would happen if i budded two of them when they were about 1 ft tall and i started using the flowering nutes about two weeks in i keept the ph at about 5.8 check it every day i used the nutes as they were directed but since it was dwc i only used a quetar of what they said to use and the two that i budded early turned bright yellow they still grew buds and all bud it came out smeeling relly weird and i want to know if that is becuz i budded it so small the other two that i grew at the rugular rate of veg for 2 months and flower for 10 weeks using the same nutes at the same rate and it came out so good i just want to no why this happend to the small plants
thanx

 

[whitey78]

I am having a hard time understanding whats going on due to the running on, but I think you stated you only used a 1/4 nutes the entire grow with the DWC... Those were the ones you had problems with?

I would say that you werent using the nutes properly... I have never heard of using 1/4 strength nutes other than for seedlings or clones, but once they are mature they can accept full strength nutes. However, I have never used AN nutes so maybe they recommend that you only use 1/4 strength but I find that hard to believe for anything other than seedlings or young clones.

 

[sanjose]

i used a quarter of the nutes threw the whole grow thats what i was told to do seeing that the roots stay in the solution 24/7 and i was told if i use them at full strength i will give my plants nute burn i keept all the plants at the same ratio 5.8 ph daily and 1/4th the nutes but the only thing that was diffrent was that the ones that came out nasty i had put into the flowering room when they were only 2 foot tall so that way it would bud as a small plant i have done this before and i got 2 oz of the little plants but what i think went wrong was that the advanced nutes were to strong for the little plants but i am not sure the bigger plants came out good just the small ones got all yellow and ugly i know it wasnt to much nitrogen i think mybe a few bad clones sorry i dont have any more info i am at work right now an this is all i can think of but i will write more when i get homethanx

 

[HempRocket]

Read this:

Well these are the charts I have available... and after- is help for those of you who- due to resourses- must use Miracle grow (or schultz/Peters) Or Fish Ferts.


This Lists the BASICS needed to use most readily available Brands (and a few of the extras-- but there ARE more!) and both a weekly schedual (dirt & hydro IF you change the water weekly) and Phasic feeding for bubblers.
Phasic shedules can be followed for soil-- but do not work as well!

ALL MEASURES ARE PER U.S. GALLON...
Hope this helps!!!


EDITED NOTE FOR PHASIC FEEDINGS!!!
Unless your Nutes specific schedule tells you what to do for sprouting and seedling, you need to cut back on the nutes for that stage BEFORE youconsider it to be "phase one"
Week ONE is NOT as soon as they are sprouted and have leaves! Week one is after they have 4 sets of true leaves---
Start your new seedlings in JUST Ph adjusted water (can use hydrogard & superthrive)
When they get their 3rd set of leaves--add HALF of the amound called for in phase 1 of your phasic schedule--
When they open another 2 sets of leaves (fully!) then add the other 1/2 to bring it to the amount required for "Phase 1" this will greatly reduce the possibility of nute-burn or over feeding...and allows the babies to adjust to the nutes easier.
Thanx!


NOTE ABOUT FLUSHING!!!
If growing in Soil, you usually Start flushing (running clear water thru the soil to rince out the un-used nutes) 2 weeks prior to harvest. This is nessisary to force the plant to use it's stored nutes & protiens, that otherwise result in harsh or grassy product.
But flushing also OFTEN results in losing yield; since you will reduce the available nutrients to the plant during the last 2 weeks of growth when the plants usually put on the most weight.
Simply STOP Nuting at whatever week you are at when time to flush.
IF you use the Ememrgency flush method, follow the entire schedule until the plants are ready to harvest.


BOTANICARE PURE BLEND PRO SCHEDULES


PRODUCTS:
PBP Grow= $18 (usd)
PBP Bloom=$18 (either soil or hydro formula)
Cal-Mag Plus= $18
Liquid Karma= $20


PHASIC:

Week 1: 7.5 ml PBP Grow + 5ml Liquid Karma
Week 2: Add: 7.5ml PBP Grow + 5ml Liquid Karma + 6ml Cal-Mag Plus
Week 3: Add: 10ml PBP Grow
Day 1 12/12: Drain & Refill reservoir ADD: 25ml PBP Bloom + 5ml Liquid Karma + 6ml Cal Mag Plus
Week 5: Add 2ml PBP Grow + 2ml Karma + 3ml PBP Flower + 2mlCal-MagPlus
3-4 Days before harvest, flush by dumping rez and filling with plain tap water.


WEEKLY:

Week 1: 7ml PBP Grow + 5ml Liquid Karma
Week 2: 15ml PBP Grow + 6ml Cal Mag Plus + 10ml Liquid Karma
Week 3 &4: 25ml PBP Grow + 7ml Cal Mag Plus + 10ml Liquid Karma
Week before 12/12: 15ml PBP Grow + 15ml PBP Flower (soil formula) + 7ml Cal Mag + 10ml Liquid Karma
Week 1 of 12/12 : 25ml PBP Bloom + 7ml Cal Mag Plus + 10ml Liquid Karma
Week 2&3: 30ml PBP Bloom + 7ml Cal Mag Plus + 10ml Karma
Week 4: 20ml PBP Bloom + 10mg PBP Grow + 7ml Cal Mag Plus + 10ml Karma
Week 5 &6: 30ml PBP Bloom + 7ml Cal Mag Plus + 10ml Karma
Week before flush: 15 ml PBP Bloom + 6ml Cal Mag Plus + 6ml Karma
(repeat if not ready for flush)



DUTCH MASTER SCHEDULE

Products:
ONE Grow= $9 (usd)
ONE Flower=$9
MAX Grow=$16
MAX Flower=$16
Silica :$22 (strengthens plants cellular structure and increases blooming)

Optional Suppliments:
Penetrator: $25 (Used with foliar sprays, allows the plant to absorb & use foliar sprays to max)
Folitech Grow & Flower $32 each (Foliar sprays developed to maximize photosynthesis in veg & blooming in 12/12)



PHASIC: (per gallon)

Week one begins when clones are rooted & planted, or when seedlings have 3 sets of true leaves

Week One: 14tsp One GROW + 2tsp Max Grow
Week 3 add: 4 tsp One GROW + 1tsp Silica
Day 1 of 12/12: Flush & refill adding: 18 tsp One Flower + 2tsp Max Flower + 1 tsp Silica
Week 5 of 12/12: 4 tsp One Flower


WEEKLY: (per gallon)

Week 1: 14tsp One Grow +2tsp Max Grow
Week 2: 16tsp One Grow + 2tsp Max Grow
Week 3: 18tsp One Grow + 2tsp Max Grow
Week 4*: 20 tsp One Grow + 2tsp Max Grow + 1tsp Silica
* use this until 12/12 if vegging longer!
Week 1, 2 & 3 of 12/12: 22tsp One Flower + 2 tsp Max Flower + 1 tsp Silica
Week 4: 20 tsp One Flower + 2 tsp Max Flower
Week 5: 14tsp One Flower + 2tsp Max Flower
Week 6: 12tsp One Flower + 2tsp Max Flower + 1 tsp Silica (if need more time till flush, repeat weeks 5 & 6)
When You flush: add 1tsp Silica to 1 gallon of water and use as the final flooding after you flush them well!



FOX FARMS SCHEDULE

Product list:

Grow Big--$16
Tiger Bloom--$16
Big Bloom --$16
Open Seseme--$23
ChaChing--$23
Beastie Bloom --$23
And the Optional : Bush Doctor Sledgehammer--$26

There is a 3-pack available for $65 of Open Sesame, Cha Ching and Beastie Bloom IF you can find it!

The last 4 Products are used in small quantities and only at specific times during the grow -- so if you know someone who wanted to go in on the 3-pack with ya, it would be worth it!

Here's the FoxFarms Feeding Schedule for Soil... Hydro is MUCH more complex, unless you use bubblersthen you can follow a Phasic feeding schedule (At end of weekly schedule!)


FOX FARMS FEEDING SCHEDULES


WEEKLY FEEDING- per Gallon
Sprouting and week 1--BigBloom 2TBS
week 2-- 2tsp Grow Big + 2TBS Big Bloom
Week 3--3tsp Grow Big + 2TBS Big Bloom
Week 4--JUST 3 tspGrow Big + 1/4 tsp Open Sesame
Week 5 same as week 4 unless going 12/12--

Week 5- OR--day 1 of 12/12-- 2 tsp Tiger Bloom +1TBS Big Bloom + 1/2 tsp Open Sesame
Week 6--same as above
Week 7-- 2 Tsp Grow Big + 2 tsp Tiger Bloom +1TBS Big Bloom + 1/4 tsp Beastie Bloom
Week 8-- 2Tsp Grow Big + 2 tsp Tiger Bloom +1TBS Big Bloom + 1/2 tsp Beastie Bloom
Week 9-- 2 tsp Tiger Bloom +1TBS Big Bloom + 1/4 tsp Cha Ching
week 10-- Same as above
Week 11--2 tsp Tiger Bloom +1TBS Big Bloom + 1/2 tsp Cha Ching


At beginning of week 11--Check Trichomes-- Flush if ready.. otherwise, continue as with week 11 every week until you flush!


Also recomended--but not a nessesity--
Bush Doctor Sledgehammer (prevents lock-out)
use 2 drops per gallon of water between feedings starting in week 4 of 12/12



PHASIC SHEDULE: (per gallon)
(follow this for bubblers, OR you can use these amounts when watering in soilbut is not as good as the weekly schedule for soil!)

New Clones, or when seedlings get 3 sets of leaves- 1tsp Grow Big + 2tsp Big Bloom
Week 3 of veg (unless going 12/12) ADD 1tsp Grow big + 2 tsp Big Bloom
4 Days Before going 12/12- Add ¼ tsp Open Sesame
Day 1 of 12/12 Drain Reservoir & refill. Add 2 tsp Tiger Bloom + 1TBS Big Bloom + ½ tsp Open Sesame
Week 3 of 12/12Add ¼ tsp Beastie Bloom
Week 5 of 12/12Drain and refill reservoir Add 2 tsp Grow Big + 1 tsp Tiger bloom + 1 TBS Big Bloom + ¼ tsp Cha ching
3-5 Days Before harvest-- Drain and refill reservoir add 2 drops Sledgehammer


keep the res filled in between feedings with ph adjusted water--



The reasonFox Farms doesn't list nutes for weeks 2 & 4 is that it ASSUMES your res won't go down, so you won't NEED any additional nutes (if your res stays full- great!)..
but if the plants are pretty big, or the room is warm/dry-- they can need refilling up to 3-4x a week!!! The chart doesn't take that into account--
Remember-- feed AT MOST 1x each week-- only water in-between!
Use additional nutes from week one at 1/2 rate until in flower (between recomended feeds) then in flower-- for additional feeds, use the nutes from the 1st week of flower at 1/2 rate in between...again--NEVER feed more than 1x a week!

Bubblers MAY use the weekly Schedules-- BUT ONLY if you use an ec/ppm meter to keep the levels where they should be....
an ec around 1.2-1.5 in veg.. then 1.5 -1.7 in flower unlitt the last 2-3 weeks... then can go as high as 2.0. Watch yor plants! they'll tell you if you are over/under feeding!



GENERAL HYDROPONICS SCHEDULE

PRODUCTS NEEDED:
GH Flora Grow=$10 (USD's)
GH Flora Bloom = $10 (choose hydro blend or soil growing blend!)
GH Flora Micro= $15


WEEKLY FEEDING SCHEDULE:
Week 1 (rooted clones or 3 leaf-sets on seedlings) : 2.5 ml EACH Grow, Micro & Bloom
Week 2: 5ml Grow + 2.5ml Micro + 2.5ml Bloom
Week 3: 10ml Grow + 5ml Micro + 3ml Bloom
Week 4 until 12/12 : 12ml Grow + 6ml Micro + 3ml Bloom
Week 1 of 12/12 : 6ml Grow + 6mil Micro+10ml Bloom
Week 2 of 12/12: 3ml Grow + 7ml Miccro + 12ml Bloom
Week 3: 3ml Grow + 8ml Micro + 14ml Bloom
Week 4: 3ml Grow + 8ml Micro + 16ml Bloom
Week 5: 2..5 Grow + 7ml Micro + 18ml Bloom
Week 6: NO GROW + 6ml Micro + 20ml Bloom USE UNTIL FLUSH!
Flush 10-14 days before harvesting


Phasic Schedule

This is for the Basic 3-Part General hydroponics nutes
Flora Micro, Flora Grow, and Flora Bloom
There are supplements available, and will be discussed at end of nute schedule.


Day one(seedlings or new clones not completely rooted)
2.5 ml Flora Grow + 2.5ml Flora Micro + 2.5 ml Flora Bloom

Day 7 Add: 12.5ml Flora Grow + 7.5ml Flora Micro + 2.5ml Flora Bloom Per Gallon & Top-off reservoir

Keep at this level entire Grow period
Keep reservoir to fill line of water
ONLY ADD nutes if vegging MORE than 5 weeks


Extra vegging: Add 5ml Flora Grow + 2ml Flora micro + 2ml Flora Bloom ONLY ONCE!


When You go 12/12empty & rinse reservoir, then refill and add
5ml Flora Grow + 7.5ml Flora Micro + 15ml Flora Bloom

DAY 30 add: 1ml Flora Grow

On Day 40 of 12/12--add 10ml Flora Micro + 15mg Flora Bloom



SUPPLIMENTATION
General Hydroponics also makes supplements. These are optional products. Some people swear by them, others report little noticeable difference. Try them if you like; you may see some worthwhile results.

Floralicious: Concentrated bioactive microbial, marine, mineral, and plant extracts. Contributes to aroma and flavor
Comes in Grow and Bloom formula-add 5ml to your current nutes schedule.

KoolBloom: Concentrated additive that makes for bigger and more blooms, increases essential oil production.
Add 1.5 grams during last 2 weeks of bloom

CHI: Foliar spray made from Chitin (a marine extract) Makes the plant insect resistant!
Use ONLY as a foliar spray!!
Use 210ml per gallon throughout Veg & bloom cycleuse only every other week, and stop 3 weeks before Harvest!!

Diamond Nectar: Premium Fulvic Acid allows the plant to break-down and use nutrients more efficiently.
Add 40ml during Veg cycle (only once!) and 40ml during 12/12 cycle(only once!)


Florasheild: Natural microbial enzymes that keep your reservoir clean and aids against fungus & disease.
Add 37ml per gallon during each stage... can also use double-strength to sterilize tools!

Flora Kleen: Used as a pre harvest or emergency flush! Follow bottle directions.



GHBB (Bio-Bizz) OMRI Schedule

PRODUCTS NEEDED:
Bio- Grow= $16
Bio- Bloom=$16
Top Max Stimulator=$20
Alg-A-Mic (for hydro only) $18



PHASIC:

Week 1: 2 tsp Grow
Week 3: Add: 2 tsp Grow, 1 tsp Alg-a-mic, 1 tsp top max, 1 tsp Bloom
Week 3: Add: 1tsp grow, 1 tsp Alg-a-mic, 1 tsp top Max, 1 tsp Bloom
Day 1 12/12: Drain & Refill reservoir
ADD: 3tsp Grow, 3 tsp Alg-a-mic, 3 tsp Bloom, 1 tsp Top Max
Week 3 of 12/12: add: 3 tsp Grow, 3 tsp Alg-a-mic, 4 tsp Bloom, 1 tsp Top Max
Week 5 of 12/12: add : 3 Tsp Grow, 4 tsp Alg-a-mic, 4 tsp Bloom, 4 tsp Top Max
Week 6 of 12/12 add: 1 tsp Grow, 2 tsp Alg-a-mic, 2 tsp Bloom, 2 tsp Top Max
Flush 3-5 days before harvest.

(for sativa’s or plants that have more than 7 week of bloom, continue week 8 by repeating week 6, and again in week 10 if needed)

WEEKLY FEEDING:

Week 1: 1 tsp Grow
Week 2: 1 tsp Grow
Week 3: 1 tsp Grow + 1 tsp Bloom + 1 tsp Top-Max
Week 4: 1 tsp Grow + 2 tsp Bloom + 1 tsp Top-Max
Week 5: 1 tsp Grow + 2 tsp Bloom + 1 tsp Top-Max
Week 1 of 12/12 : 1 tsp Grow + 3 tsp Bloom + 1 tsp Top-Max
Week 2: 1 tsp Grow + 3 tsp Bloom + 1 tsp Top-Max
Week 3; 1 tsp Grow + 3 tsp Bloom + 1 tsp Top-Max
Week 4: 1 tsp Grow + 4 tsp Bloom + 3 tsp Top-Max
Week 5: 1 tsp Grow + 4 tsp Bloom + 4 tsp Top-Max
Week 6: 1 tsp Grow + 4 tsp Bloom + 3 tsp Top-Max


(For Sativas or plants that need 7 weeks or more to bloom, continue with week 6 until flush)




IONICS SCHEDUAL:

Ionics has made their nutes pretty darned simple to use!
With no mixing needed... same schedule for weekly OR phasic feeding.
PRODUCTS NEEDED:
IONIC GROW=$14.00 (USD)
IONIC BLOOM=$14.00
IONIC BOOST=$14.00

Also Suggested:
NITROZYME=$19.00
FOSSILFUEL=$17.00


SCHEDULE:
From 3-leaf stage to day 1 of 12/12: Feed Weekly Using 4 tsp per Gallon of IONIC GROW.
It is also recomended (but not nessisary) to also add 2TB nitrozyme and 4tsp Fossil Fuel.


Phasic--same amounts per gallon, once when you fill reservoir, and as needed (not more than 1x weekly) when you re-fill the rez.!


From day 1 of 12/12: feed weekly using 4tsp per Gallon of IONIC BLOOM.
It is also recomended, but not a nessesity, to also add 2TB nitrozyme and 4tsp Fossil Fuel.

Phasic: Day one of 12/12- dump & refill reservoir using same amount
per gallon.. and these amounts when re-filling the rez (not more than
1x a week)

Week 5 of bloom (5 weeks after they actually SHOW): Add 3/4 tsp per gallon of IONIC Boost WITH the 4tsp per gallon of IONIC Bloom.
It is also recomended to also add 2TB nitrozyme and 4tsp Fossil Fuel.

Phasic: Week 5 of Bloom add 3/4 tsp per gallon of IONIC BOOST to
the reservoir ....and these amounts when re-filling the rez (not more
than 1x a week)

FOLIAR FEEDING: IONIC recomends using 1/2 tsp per quart of EACH:
NITROZYME + FOSSIL FUEL in addition to 1/2 tsp of IONIC GROW or IONIC BLOOM as a foliar spray every week

SUPPIMENTATION:
GREENFUSE ROOT= $20.00 (USD)
GREENFUSE GROWTH=$20.00
GREENFUSE BLOOM=$20.00

These Suppliments can be added to the above schedules as follows:

"ROOT"= 3/4tsp per gallon in water from time seed planted until has 3
sets of leaves

"GROWTH"= 3/4tsp Per Gallon to All GROW feedings

"BLOOM"= 3/4 tsp per Gallon to all Bloom feedings



Fish Fertilizer
This is for the use of Alaska brand Fish Fertilizer, and Alaska Kelp Fertilizer-- But other brands of Fish Emulsion and Organic nutrient that is JUST P & K with NO "N" value will work also.

Start The FIsh Ferts at 1/2 recomended rate when the plants have 3 sets of true leaves... after week 2 of veg, go to 3/4 stregnth...
When ready for 12/12-- you need to get some Alaska Kelp fert* (-- it is just P-K... add this to your 3/4 stregnth Fish Ferts at 1/4 stregnth... and use this blend thru the bloom period...
IF she seems to need more-- feed more often instead of increasing the amounts... with this fert , that seems to work better.

You will probably need additional micronutes-- so I would call around, or go online for EarthJuice Microblast... use at 1/3 stregnth every week.. as the Fish ferts arent complete with all the micro's needed.


*or another No Nitrogen Organic



ESPOMA NUTES :
Espoma is a brand of dry, granual organics used mostly in outdoor in-ground growing, but CAN be used at a lesser rate to enrich the soil of container plants.

It is marketed as Plant-tone, Veg-Tone, Holly-Tone, Rose-tone and Flower-tone.

You will want to get Veg-tone and Flower-tone... If flower-tone is not available, use Just the veg-tone.

For in-ground,prep your planting site, adding 1/4 cup of the Veg-tone to the hole you dig for the plants (at least 18 inches wide and 12 inches deep- the soil fluffed and back In the hole when you add the Espoma)
... or in containers, use 2 tablespoons in 5 galons of soil.
When the Plants Begin to bloom, use the Flower-tone as a top dressing according tot he bags directions, and gently rub into the soil around the plants so i doesn't wash away in the rain.

You MAY use the Fish-Fert Schedule along with the Espoma, but reduce the feedings to every other week.



FOR MIRACLE GROW NUTES :

If you really MUST use Miracle Grow Nutes or Soil cuz there isn't anything else available (cost can't be a reason, MG is about the same price as some organics !)

THEN USE THIS GUIDE PLEASE!!!

(enough for 2-3 plants .. just use more jugs for more plants!)
Get regular miracle grow (Not tomato or Rose food or azalea formula!)
AND Blossom Booster (or Schultz Professional Bloom food)
get 2- 1 gallon jugs of spring water from the store (about $1 each)
and an empty jug. Mark them (A) (B) & (C) --- (B) is the empty jug!

in the 1st jug (A) mix the MG at 1/4 the recomended rate for indoor plants.

In the 2nd jug (C), mix at 1/2 stregnth for indoor plants.

pour 1/2 of both into the empty jug (B)

Now-- when your plants get their 3rd set of leaves, feed once every 10 days. Start with (A) for the 1st 2 feed... then (B).. and end-up with (C) the week before you go 12/12.

FLUSH YOUR PLANTS WITH 5 GALLONS OF CLEAR WATER BEFOR GOING 12/12!

MG builds up-- and will lock-up as you add the stronger bloom nutes!
as the final part of the flush-- pour in a couple pints of your new bloom nutes (see below)


Do the same with your bloom nutes, Mix ahead in larger amounts... BUT--mix Jug (A) at 1/2 rate, Jug (C) at full stregnth-- and (B) the 2 mixed.

Start with (A) the 1st day of 12/12, then again in 10 days,
then switch to (B). Do not switch to (C) until the week before you flush for harvest!
when the trichomes just start turning cloudy, give em their last dose. In 10 days, check the trichs again.. if not all cloudy, you can feed again-- But go back to (B)

MAKE SURE TO FLUSH WELL AND WAIT THE FULL 2 WEEKS TO HARVEST!

You need to flush all the Nitrogen and magnesium out of the plants-- so Flush them well, put back in the bloom room the full 2 weeks till harvest, water as needed .. but absolutely no nutes or foliar sprays!

IF you foliar fed during the grow-- be sure to use a sprayer of water to gently shower it off the plants! (also gets rid of dead bugs & dust stuck to the buds!)

USING MG SOIL IS NEVER RECOMENDED!!
it has TIME RELEASED nutes-- so flushing is impossible... and you do not know how much nutes are being released or used by the plants.
If yYou Used MG soil, do NOT nute at all during veg... and use only additional P-K and suppliments without "N" during bloom...
And pre-harvest flushing can NOT be done on the normal 2 week schedule because of the time released nutes-- you must emergency flush when the trichs are how ya want em...



Cut the plant off at soil level. Place plant in a bucket with enough PLAIN tapwater to cover the base, but not touch lower limbs or vegetation....

Add a bubbler to the bucket to help "fool" the plant into thinking it is still alive (this only works up to 4 days before they wilt!)
Tthe plant will now use the nutrients stored in it's system . Leave under the lights at least 2 days-- up to 4 (3 is the usual amount)
IF you are one who puts their plants in the dark the last 3 days, give em at least 24 hours under lights before ya do... the photosynthesis will help the plant flush out unused nitrogen.


When using MG Fertilizer (as well as Schultz or Peter's ) Watch for:
Clawing
brown dry spots
crinckling leaves
pale new growth
Yellowing

if these happen, flush the plant, and wait 2-3 days before feeding again.
If Using MG soil and this happens, your best route is to re-plant in a bigger planter with different soil... DO NOT try to remove the existing soil from the roots of the plant!!!!

Good luck--
MG may not be the best-- but it CAN work!

HOPE THIS HELPS CLEAR UP THE "HOW DO I USE THIS" QUESTIONS!!!

Source: Lady Zandra

 

[Giantsfan24]

That has to be one of the longest sentences I've ever seen. Use periods bro!!

 

[Lady Zandra]

Sounds like they had root issues, over watering, or were locked-up.
When/how often did you flush them? If not flushed between Veg & 12/12 they often lock-up... and if not well flushed before harvest, will smell/taste "off"...

make sure they have enough oxygen at the root sites-- that can be an issue-- as can having too much "N" and not enough "P-K" in flower... and a HOST of other micro-nutrient deficiencies! Try adding a small dose of Microblast or SUper Cal Mag... even epsom salts. Also-- carbs can often help-- use either Sucanat from your healthfood store- a tsp. per gallon, or "Sweet- Raw" at 1/2 rate during your grow.. some plants that are touchy do well with added carbs.