Ending week 4, Temp. 78, Humidity 65/70, water Ph 6.3 /TDS 1300. Plants 14” . Lights about 17” above plants. Watering every 2 1/2 to 3 days, 22 oz. I believe I should increase. I need to run a soil Ph/TDS test. The instruction I have say to collect 4oz of soil. I am not real sure about digging out 4oz. or what level in the pot to retrieve it. Any advice about week 5 will be appreciated. @nicky,@fano-man image|690x418
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Doesn’t have to be 5oz.
Take a sample from midway into the center of the pot and down a decent way into the middle of the soil… The trick is doing this without causing much harm to the roots honestly I’ve never done it but I think a little metal tube would work good like one of those stainless steel straws they now sell everywhere. Just first fill the straw up with distilled water so you know how much fluid volume is in one straw, then use the straw to jam down into the soil and take the sample, mix it into the distilled water ensuring you get all the soil out of it. Then again I’m sure some people just dig down a bit with a tea spoon lol.
Your in to flower now so I would want that slurry test to know PH and tds. You should also ensure your VPD is as close to the marker for your stage as possible.
Check your light as per manufacturer recommendtions. Ensure your fan is giving it a nice breeze/ shake and your exhaust fan is getting rid of the oxygen rich air so your plant can suck up the co2 (ensure your venting as far away or outside if possible).
Once you know your PH and tds we can see if you need to up the feed or flush. What nutrients are you using again? Let’s make sure that feed chart is handy.
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Sunday afternoon test numbers. 1st. 5 Gal. Pot. Soil test, sample about 4” deep. Ph 7.1, TDS 3765, temp. 78, Humidity 64%… Inline fan running on auto. Runs 22CFM all the time. Every 4 or 5 minutes runs up to 10 then back down 22. Watered yesterday with 22oz Ph6.3 , VPD chart, late veg/ early Flower calls for .8-1.2kPa. 65/70% @79 g degrees.
2nd pot was almost identical. Pot Ph 7, TDS 3170.
My take… leaves that are turning yellow are thin & paper like and down low. Leaves are not falling off. Upper part of plants look good. I believe I have under-watered. Thought I would increase to 40 oz. of 6.3 water. Would that help adjust the Ph. Looking at the VPD chart I believeI am fine until entering Flower. Thanks for your help.
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LOL… I use a very small spoon… like a relish spoon… I’ve also used chopsticks.
1st 5 Gal fabric pot… TDS 3765. Ph 7.1
2nd 5 Gal fabric pot …TDS 3170. Ph 7
I’m tagging @Covertgrower here for guidance as well. If it were my plant, my knee jerk reaction would be to back off on the pH of your water for a few waterings (to the low end) and maybe even give it a flush, but you say your pH in is now at 6.3?
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The numbers depend on what you’re feeding, what kind of soil it is, and if you’re growing organically.
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Your PH is to high, that’s why soil slurry is important it shows PH accurately.
What’s the ppm of your tap water?
Do you have any nutrients or cal mag on hand?
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I believed I had a nitrogen deficiency. yellowing had had started on 2nd node on one side. Let the pot dry out … used 1Tbs of Alaskan Fish Fertilizer 5-1-1 to 1gal of Tap water adjusted to Ph 6.3. watered 2 days ago. Plants are 17” tall. 32 days old. Stretching out. I have not removed yellowed
leaves or noticed any new yellowing. Here are today’s numbers. Ph slurry test near the bottom 4.9. TDS from same solution 3640. Tap water TDS 1140. Adjusted plant water Ph 6.3. Temp 75. RH 60%. Intended to water today adding Tiger bloom 1/4 strength .
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Once damage is done in flower it will never repair. Watch your plants closely in order to make it to the finish line. They look pretty good keep it up
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1st day of 6th week. One plant stopped growing & the other stretched out close to 7 “ taller. Smallest 18” from light … tallest 11”. Should I tilt the light to accommodate the taller plant?
If it were me, I’d very gently bend down the main stem of the tallest at a 90 degree and hold it in place with some sort of tie. You can even get plastic plant trainers on amazon that work nice. Once it points back up, it’ll be flush and even with the rest of the canopy. If you wait too long, the stem will be too stiff to bend. Might need to work it back and forth a bit before it’ll bend.
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Not only would I do the same thing, I have done the same thing by force - ran out of space, so I had to bend. As @OooWee1184 states, take it slowly.
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Thanks for the info. I am a first time grower and a very old man. Reluctant to bend before I have one grow under my belt . Right now worrying about leaf problems . Would like to know if different height is normal. Here are today’s numbers 1/2 through week 6. Temp 74 RH 47%, Slurry test. Ph 6.5…TDS 3540. Today is watering day. Last two waterings …Ph 6.3, Tiger Bloom 1 1/2 oz, Cal-Meg 1/2 oz. the only other feed … Alaska Fish Fertilizers 5-1-1…3/4 tablespoon. . @Nicky @Caligurl
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Wasn’t trying to pass you up. I’am old… don’t know how to properly use forums. I have that chart…problem is I don’t have very good eyesight and I am unable to decide which one is closest to my problem. Nitrogen, Potassium and Magnesium at various stages look pretty similar to me. Being this close to the finish, I don’t won’t to create more problems by medicating wrong.
Willing to bet this is nutrient burn with those kind of numbers. With a calcium deficiency showing. @Parava
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The plants are in the middle of week 6. Last watering 3 days ago. Only added 1 1/2 oz tiger bloom and 1/2 teaspoon Cal-Meg. Drop TigerBloom and add Cal-Meg ?@Covertgrower
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