Hawaiian Snow probs. that will not go away!

Continious probs with Hawaiian Snow grow.

How long has this problem been going on? 4-5 weeks
Are you growing in a PVC grow tent? (example: Hydrohut or any other non brand tents) no
What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...) DWC
What STRAIN are you growing? Hawaiian Snow via Green House
What was the establishing technique? (Were the seed or clone?) seed
What is the age of your plants? 40 days veg, 41 days flower
How long have they been in there mixture they are in now?(coco,soiless etc..) Rap[id Rooterr starters and hydroton
How tall are the plants? 2.5' Scrog
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? flower
What Technique are you using? SCrog
What substrate/medium are you using?(Hydroton, RockWool etc.) hydroton
What is the Water temperature? 65*
What color are your roots? White? Brown? Are your roots slimy? Light brown (due to addition of Dark Energy supplement)
What Nutrient's are you using?(If growing soiless) Lucas with GH, Cal-Mag, Dark Energy
How much of each nutrient are you using with how much water? 0-8-16 @ 1350ppm
How often are you feeding? (If using soiless) Constant DWC
If flowering, when did you switch over to using Bloom nutrients? Lucas add back formula
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect) micros into a gallon of water which gets mixed into the res, then bloom nutes get the same
What is the TDS/EC/PPM you are using? 1350 ppm
What is the pH of the "Tank"? 5.7-6.0
Are you sure your calibration is correct on your equiptment? yes
When was your last watering? NA
What is your water temps? 65*
When was your last feeding change? (ie. grow-bloom-micro-additional) this morning
How often do you clean your system: example: Flush out water replace with clean water and nutrients? 40 days (flowering)
What size bulb are you using? 400w HPS w
What is the distance to the canopy? ~1’ due to cool tube
What is your RH Factor(Relative Humidity)? 25%
What is the canopy temperature? ~80
What is the Day/Night Temp? (Include flucutaion range) 75-65
What is the current Air Flow? (cfm etc.) 16” Mounted Fan
Tell us about your ventilation, intake exhaust and when its running and not running ? Open Door adjacent to grow plus the mounted fan
Is the fan blowing directly at plants? Not the dayton, but others are
Is your water HARD or SOFT? soft
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? R/O
Are you using water from a water softener? no
Has plant been recently pruned, cloned off of or pinched? Not for several days
Have any pest chemicals been used? If so, What and When? no
Are plant's infected with pest's? no

https://www.rollitup.org/view.php?pg=faq&cmd=article&id=37

look in here .... hope this helps...rob

Thanks-good resource. I am wondering if it is not just one prob., but a combination of two or three??

How much Cal Mag are you using?

Less than recommended, as I thought the issue that I had earlier regarding a possible Cal or Mag. deficency was due to low PH (lockout). Once I corrected the PH I thought that was that. Am I wrong? If the PH fluxuates between 5.6-6.0 would not the lock out not be a problem?

Hawaiian snow is a tricky plant. I grew it a couple of times in soil. Go to Youtube and type in the name of the strain. Greenhouse seed company makes it. They have a video from start to end on how they grew it.

Yea- I would agree with the description of Hawaiian Snow as a tricky grow. The problem is I am growning in DWC and cant seem to find any answers.

Maybe the necrosis is from the previous ph problem. As long as ur drifting above 5.8. You should be cool. I'd up the cal-mag myself.

I'm not sure if I'm reading this right but you haven't flushed your reservoir in 40 days? Have you considered flushing everything and starting over. 90% of the time that solves the problem.

According to the Lucas formula (which I have used successfully for several grows), there is no need to change the res. until you switch from veg to flower. Al long as you are replacing the lost solution with fresh water and nutes you should be fine.
I did consider you suggestion though-but am hopeful that can be avoided. If the problem persists I will have no other option.

Dude. Hawaiian snow has to be flushed once a week. use a 5.5 solution. It also likes warm days and cool nights.

sativaplanet420 said:

Dude. Hawaiian snow has to be flushed once a week. use a 5.5 solution. It also likes warm days and cool nights.

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The res. holds about 20 gallons and their are three plants. I have used the same set up to support 6 plants for an entire flower with no charge of res. and the plants we happy and healthy. I am grateful for the coments, but I would not agree with your assumption that the res. needs changing unless somehow H. Snow is just not suited for a LUCAS grow-and that seems inprobable. Some one recommended that this could be due to a combination of two things: low humidity (mine is 25%) plus a fan blowing the dry air through the tops of the plants. I would say that this could be so. Any thoughts?

D4ster said:

The res. holds about 20 gallons and their are three plants. I have used the same set up to support 6 plants for an entire flower with no charge of res. and the plants we happy and healthy. I am grateful for the coments, but I would not agree with your assumption that the res. needs changing unless somehow H. Snow is just not suited for a LUCAS grow-and that seems inprobable. Some one recommended that this could be due to a combination of two things: low humidity (mine is 25%) plus a fan blowing the dry air through the tops of the plants. I would say that this could be so. Any thoughts?

Click to expand...

I have a thought...flush your resevoir. Problem hasn't gone away and you're just wasting time. Regardless you don't know where the problem lies and you can't do a whole lot about your humidity I'm guessing. I would try flushing the resevoir and wasting 20 gallons of water as that's not really a big deal.

If you aren't thinking that flushing the res is going to help try hand watering with fresh water after each watering (if that makes any sense). Flood, drain, and after it's drained just run them through with some clean ph 5.5 water and see if they bounce back a little bit.

Has growth stopped?

Your humidity is low but not the problem. You should be around 40% in flower. I would still give them a good flush with clearex at 5.5 ph for about an hour.

Sativa-Thanks. I think you are right and there is little left for me to do at this point except what you suggest. will remit.