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 Heptahydrate 0.7 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:16” 75% Actual. 83.5% Effective Dimmer
742/535 PPFD (Peak/Periphery)
Plant Development
Odor: Slight
✓ Plant Height Start of Week - Veg
Plant Height (in)
Pot & Plant Height (in)
Light Height (in)
11
24
48
◦ 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 Mendel’s 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
⁃ Meh, Muddy Green, Lack Luster …
⁃ Resetting Lamp for ‘new’ heights (see start/above). Raised to within 1” of Max Height in Cabinet
⁃ Delivering
Found This:
I think I have a Zinc Deficiency due to RO water
was
Zinc Deficiency Symptoms
• The leaves of the plant turn 90 degrees sideways.
• The tips of the leaves become ‘burned’ and discolored, with brown spots arriving shortly afterward.
• New growth shows signs of interveinal chlorosis.
https://wayofleaf.com/cannabis/growing/cannabis-nutrient-deficiencies
Last 7 Minutes of Leighton Morrisson’s 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
✓ 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
⁃ Cleaned off Yellow lowers. Plant is eating N2, and probably would like some Potassium. Will consider Small Amount of Alfalfa Meal. It’s too late in flower I think for Kelp Meal, w/ gibberilins and what all
⁃ PLAN: Amend w/ some Alfalfa meal, and water another 240 ml w/ SLF, THEN Get on EVENING (Plant’s Morning) Waterings.
✓ 240 ml, RO, SLF AM
◦ 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
⁃ Looking Droopy, Added 240 ml. 3 Hours Later, lackluster, meh green, … VPI 1.17, though temp to ~80F, ~57% RH
⁃ Some leaf twisting (turning away from center leaf, and some down curl on a couple leaves.
⁃ Lower leaves showing Nitrogen deficiency - Kelp Meal or Alfalfa, at what rate?