Week 9 - Flower - Wednesday 2021.07.14
This week I finally acknowledged the 'tip burn' followed by 1/4-1/3? brown at leaf tip INDICATES ZINC DEFICIENCY.
After some investigation, The following symptoms I've experienced ACROSS my grow are:
- SHORT Inter-nodal Spacing
- Overall stunting of plant
- Difficulty to flower
THIS is my experience the past 2 grows w/ RO.
LESSON LEARNED: IFF one must use RO - ALWAYS REMINERALIZE!!!!
Demeters Destiny (GREAT PRODUCT) is NOT ideal for Remineralization. (I was thinking just get PPM ~100 or so. Wrong)
<H1>Remineralization of Reverse Osmosis (RO) Water</H1>
@KingdomAquaponics/Leighton Morrison: Remineratlization Formula
0.4 g Calcium Chloride Dihydrate
2.0 g Calcium Sulphate Dihydrate
2.0 g Magnesium Sulphate Heptahydrateโจ0.7 g Potassium Carbonate
25 Liters of Water
This solution provides:
- 24 ppm Calcium
- 8 ppm Magnesium
- 16 ppm Potassium
- 7 ppm Chloride
- GH = 5
- KH = 1
Calcium Sulphate, Magnesium Sulphate, and Potassium Carbonate may be purchased by The Nutrient Company. Calcium Chloride can be found on eBay.
Lighting
Reference LD:16โ 75% Actual. 83.5% Effective Dimmer
742/535 PPFD (Peak/Periphery)
Plant Development
Odor: Slight
โ Plant Height Start of Week - Veg
Plant Height (in)
Pot & Plant Height (in)
Light Height (in)
11
24
48
โฆ End of week Heights
Plant Height (in)
Pot & Plant Height (in)
Light Height (in)
Watering Log
160 ml/Day Week 9
Watering Log
AM
PM
Notes
Wednesday
240
-
RO, DD
Thursday
-
-
Friday
240
-
RO, DD, MMP
Saturday
240
360
RO, SLF
Sunday
-
-
Monday
250
Filtered, humic acid, mmp, psp
Tuesday
-
-
Sub-Totals
760
360
Total
1120
Environment Targets
VPD - 1.0 +/- 0.2
Black Strap, a Brother Mendelโs Selections & Mandalorian Genetics Collaboration
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Day 69/9 - Flower - Tuesday 2021.07.20
BSAF X 69:F:9:7
Black Strap - Brother Mendel/Mandalorian Collaboration
Observations
Day 68/10 - Flower - Monday 2021.07.19
BSAF X 68:F:9:6
Black Strap - Brother Mendel/Mandalorian Collaboration
Observations
Day 67/11 - Flower - Sunday 2021.07.18
BSAF X 67:F:9:5
Black Strap - Brother Mendel/Mandalorian Collaboration
Observations
โ Meh, Muddy Green, Lack Luster โฆ
โ Resetting Lamp for โnewโ heights (see start/above). Raised to within 1โ of Max Height in Cabinet
โ Delivering
Found This:
I think I have a Zinc Deficiency due to RO water
was
Zinc Deficiency Symptoms
โข The leaves of the plant turn 90 degrees sideways.
โข The tips of the leaves become โburnedโ and discolored, with brown spots arriving shortly afterward.
โข New growth shows signs of interveinal chlorosis.
https://wayofleaf.com/cannabis/growing/cannabis-nutrient-deficiencies
Last 7 Minutes of Leighton Morrissonโs GrowCast Podcast
https://podcasts.apple.com/us/podcast/growcast/id1077793493?i=1000528417823
Tap water hasp plenty of Zinc - will try Filtered . . . w/ Humid Acid
1x1/24/36
โ Measure, Reset Lights @ 14.5 (opt) @75% Dimmer (83. 5% Effective)
Day 66/10 - Flower - Saturday 2021.07.17
BSAF X 66:F:9:4
Black Strap - Brother Mendel/Mandalorian Collaboration
Observations
โ Cleaned off Yellow lowers. Plant is eating N2, and probably would like some Potassium. Will consider Small Amount of Alfalfa Meal. Itโs too late in flower I think for Kelp Meal, w/ gibberilins and what all
โ PLAN: Amend w/ some Alfalfa meal, and water another 240 ml w/ SLF, THEN Get on EVENING (Plantโs Morning) Waterings.
โ 240 ml, RO, SLF AM
โฆ Top Dress Kelp Meal 20 gms around periphery.
360 ml, RO, SLF, PM
Day 65/11 - Flower - Friday 2021.07.16
BSAF X 65:F:9:3
Black Strap - Brother Mendel/Mandalorian Collaboration
Observations
Day 64/12 - Flower - Thursday 2021.07.15
BSAF X 64:F:9:2
Black Strap - Brother Mendel/Mandalorian Collaboration
Observations
Day 63/13 - Flower - Wednesday 2021.07.14
BSAF X 63:F:9:1
Black Strap - Brother Mendel/Mandalorian Collaboration
Observations
โ Looking Droopy, Added 240 ml. 3 Hours Later, lackluster, meh green, โฆ VPI 1.17, though temp to ~80F, ~57% RH
โ Some leaf twisting (turning away from center leaf, and some down curl on a couple leaves.
โ Lower leaves showing Nitrogen deficiency - Kelp Meal or Alfalfa, at what rate?