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mainlining Jack Herer on 40x40cm

10
117
12
430
2d ago
RAM 08-350-150 Filter - 100/200
Qualitäts-Blumenerde Soil
Compo Sana
Perlite
Floragard
Indoor
Room Type
Transplantation
weeks 2
Main-Lining
weeks 3-4, 14
12 liters
Pot Size
Start at Harvest
G
Germination
3mo ago
zorn_des_kinski Welcome to my second grow diary and my 4th grow in total! Jack Herer has been on my list for a while now and when there was a sale at Sensi Seeds I immediately got a 3+1 pack. I´ve never had the opportunity to try this strain but I heard so much praise that I´m already very exited for the harvest 😊 I germinated it using the papertowel in a ziplock bag method. After only one day the root was visible and i planted it into a 0.5l transparent cup with some holes in the bottom. I put some black tape on it so the roots won´t be exposed to light. Another transparent cup was used as a humidity dome. On 19.06.2025 the cotyledons were unfolded, I count this as day 1. My plan for this plant is to try 4 or 8 fold mainlining and start the flowering phase early as I´ve heard that this strain likes to stretch a lot.
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Used method
Paper Towel
Germination Method
1
Week 1. Vegetation
3mo ago
4 cm
Height
18 hrs
Light Schedule
30 °C
Day Air Temp
No Smell
Smell
40 %
Air Humidity
0.5 liters
Pot Size
45 cm
Lamp Distance
zorn_des_kinski Even though the temperature and humidity are far from ideal the plant develops well. Today on 25.06 i removed the humidity dome and she looks happy. Lighting is at ~40%, no circulation fan so far.
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2
Week 2. Vegetation
3mo ago
15 cm
Height
18 hrs
Light Schedule
32 °C
Day Air Temp
6.5
pH
Weak
Smell
45 %
Air Humidity
12 liters
Pot Size
40 cm
Lamp Distance
Nutrients 2
Alfa Boost
2 mll
Calmag - BioBizzWWO
Calmag
0.5 mll
zorn_des_kinski In the last week I repotted the plant into its final 12l fabric pot. We had a proper heatwave in Germany - outside temperatures went up to 37°C (98.6°F) where I live, and in the tent, temperatures reached 34°C (93.2°F) - way too hot. Luckily, the plant didn't suffer as much as I did, she grows happily along and doesn't seem to mind. When watering I used 0.5ml/l CalMag and 2ml/l Alfa Boost, pH adjusted to 6.5. I'll carefully start using fertilizer with the next watering.
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Used techniques
Transplantation
Technique
3
Week 3. Vegetation
3mo ago
10 cm
Height
18 hrs
Light Schedule
30 °C
Day Air Temp
6.5
pH
Weak
Smell
45 %
Air Humidity
12 liters
Pot Size
35 cm
Lamp Distance
Nutrients 2
Alfa Boost
2 mll
Calmag - BioBizzWWO
Calmag
0.5 mll
zorn_des_kinski I began training her into a 4 fold mainline by topping above the third node when she had 6 nodes in total. I gave her a few days and then removed all growth below the third node. Some gardening staples were used to bind down the emerging side shoots horizontally. After the initial top I only watered her with pH adjusted water and a bit of CalMag and Alfa Boost. Now I wait for the side shoots to develop 3-4 new nodes and will then cut next to the first nodes. Temperatures decreased a bit but I'm still looking at 29-31°C in the tent.
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Used techniques
Main-Lining
Technique
4
Week 4. Vegetation
3mo ago
15 cm
Height
18 hrs
Light Schedule
30 °C
Day Air Temp
6.5
pH
Weak
Smell
45 %
Air Humidity
12 liters
Pot Size
35 cm
Lamp Distance
Nutrients 3
Alfa Boost
2 mll
Calmag - BioBizzWWO
Calmag
0.5 mll
Green Power 5in1 - S&R Organics
Green Power 5in1
2 mll
zorn_des_kinski Continued mainlining-training with the second topping right after the first nodes of both sideshoots, as well as bending down the four newly emerging shoots horizontally. Also removed leaves that were covering new growth on them. Got a slight fungus gnat infestation which I treat by spraying and watering with neem oil emulsion.
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Used techniques
Main-Lining
Technique
5
Week 5. Vegetation
2mo ago
23 cm
Height
18 hrs
Light Schedule
28 °C
Day Air Temp
6.5
pH
Weak
Smell
50 %
Air Humidity
12 liters
Pot Size
35 cm
Lamp Distance
Nutrients 3
Alfa Boost
2 mll
Calmag - BioBizzWWO
Calmag
0.5 mll
Green Power 5in1 - S&R Organics
Green Power 5in1
3 mll
zorn_des_kinski Neem must have worked well, the fungus gnats all disappeared. I'm gonna treat her one more time to be sure. On 23.07 (day 35) I flipped her to 12/12. I wasn't sure if that was a little early, but as the strain tends to stretch a lot she will probably be tall enough anyway. Next week I will be on vacation and a friend will water her.
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6
Week 6. Flowering
2mo ago
37 cm
Height
12 hrs
Light Schedule
30 °C
Day Air Temp
6.0
pH
Weak
Smell
50 %
Air Humidity
12 liters
Pot Size
35 cm
Lamp Distance
zorn_des_kinski I'm on vacation right now and a friend cares about watering the plant but for the sake of simplicity I told him not to deal with nutrients and pH so she only receives plain tap water (pH 5.9-6). Before I left I gave her an increased amount of everything. She looks pretty hungry on the pictures he send me, maybe I can instruct him to feed her regardless. As she stretched a lot, she might be to close to the lights. To me the tips look slightly burned. Told him to raise the lights by 10cm. Edit: The height provided in this update was not measured but infered from the previous and next week's data.
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7
Week 7. Flowering
2mo ago
51 cm
Height
12 hrs
Light Schedule
30 °C
Day Air Temp
6.5
pH
Weak
Smell
50 %
Air Humidity
12 liters
Pot Size
35 cm
Lamp Distance
Nutrients 4
Compo Grow Blüte
4 mll
GrowsArtig Alfa Boost
4 mll
Calmag - BioBizzWWO
Calmag
1.5 mll
zorn_des_kinski I'm back from vacation, arrived today. The plant looks very hungry but otherwise healthy. She grew considerably and developed lots of budsites. Her stature is nothing like the other plants that I grew before her. Very straight and pretty much no sideshoots. This fits the description on the Sensi Seeds website but I'm curious how she would have developed with regular topping.
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8
Week 8. Flowering
2mo ago
61 cm
Height
12 hrs
Light Schedule
30 °C
Day Air Temp
6.5
pH
Weak
Smell
50 %
Air Humidity
12 liters
Pot Size
30 cm
Lamp Distance
Nutrients 3
Compo Grow Blüte
2 mll
GrowsArtig Alfa Boost
2 mll
Calmag - BioBizzWWO
Calmag
1 mll
zorn_des_kinski Everything seems well. Leaf color is normalizing. There are Budsites everywhere! She has a truly unique structure and I try to imagine what she will look like once the buds gain in size.
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2 comments
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9
Week 9. Flowering
1mo ago
64 cm
Height
12 hrs
Light Schedule
28 °C
Day Air Temp
6.5
pH
Weak
Smell
50 %
Air Humidity
12 liters
Pot Size
30 cm
Lamp Distance
Nutrients 4
Compo Grow Blüte
3 mll
GrowsArtig Alfa Boost
2 mll
Calmag - BioBizzWWO
Calmag
0.86 mll
zorn_des_kinski I think everything is fine. The lower leafs are fading, I hope this is not due to malnutrition.
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10
Week 10. Flowering
1mo ago
66 cm
Height
12 hrs
Light Schedule
29 °C
Day Air Temp
6.5
pH
Normal
Smell
50 %
Air Humidity
12 liters
Pot Size
30 cm
Lamp Distance
Nutrients 4
Compo Grow Blüte
4 mll
GrowsArtig Alfa Boost
2 mll
Grünpflanzen-Dünger
1 mll
zorn_des_kinski Removed yellow leaves on the lower third. Slightly increased nitrogen by adding Compo Grünpflanzen- und Palmendünger (7-3-6).
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11
Week 11. Flowering
1mo ago
68 cm
Height
12 hrs
Light Schedule
29 °C
Day Air Temp
6.5
pH
Normal
Smell
50 %
Air Humidity
12 liters
Pot Size
30 cm
Lamp Distance
Nutrients 4
Compo Grow Blüte
3 mll
GrowsArtig Alfa Boost
2 mll
Calmag - BioBizzWWO
Calmag
1 mll
zorn_des_kinski So far so good
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12
Week 12. Flowering
21d ago
68 cm
Height
12 hrs
Light Schedule
27 °C
Day Air Temp
6.5
pH
Normal
Smell
50 %
Air Humidity
12 liters
Pot Size
30 cm
Lamp Distance
Nutrients 4
Compo Grow Blüte
4 mll
GrowsArtig Alfa Boost
2 mll
Calmag - BioBizzWWO
Calmag
1.5 mll
zorn_des_kinski Brown spots appeared on some leaves so I increased the amount of CalMag
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13
Week 13. Flowering
14d ago
69 cm
Height
12 hrs
Light Schedule
27 °C
Day Air Temp
6.5
pH
Normal
Smell
50 %
Air Humidity
12 liters
Pot Size
30 cm
Lamp Distance
Nutrients 4
Compo Grow Blüte
4 mll
GrowsArtig Alfa Boost
2 mll
Calmag - BioBizzWWO
Calmag
1.5 mll
zorn_des_kinski Getting chonky :)
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4 comments
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14
Week 14. Flowering
7d ago
69 cm
Height
12 hrs
Light Schedule
25 °C
Day Air Temp
6.5
pH
Normal
Smell
50 %
Air Humidity
12 liters
Pot Size
30 cm
Lamp Distance
Nutrients 4
Compo Grow Blüte
2 mll
GrowsArtig Alfa Boost
2 mll
Calmag - BioBizzWWO
Calmag
1.75 mll
zorn_des_kinski The plant is ripening. The colas gain in mass and start to bend. I'm gradually decreasing nitrogen fertilizer while maintaining the rest. Probably another 1-2 weeks.
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Used techniques
Main-Lining
Technique
15
Week 15. Harvest
2d ago
Happy Harvest Day!
Spent 100 days
Ger Veg Flo Har
1
Plants
0.16
Grow Room size
Normal
Difficulty

Height
Day air temperature
Air humidity
PH
Light schedule
Pot size
Lamp distance
zorn_des_kinski Today was the day. I thought about harvesting for a few days now and when I moved the plant to the tub to water it, the colas just fell over from their own weight. Two days ago I also noticed a few bananas which I immediately removed but this made me nervous to push the plant further and risk ending up with seedy buds. I assume there might have been other nanas I didn't notice so I expect to find some seeds. Not ideal but certainly not the end of the world. It has been almost 10 weeks since the flip to 12/12. The trichomes are mainly milky with some clear ones and the occasional amber. With this strain I'm not after a heavy couch lock and want to be able to stay productive. As I've decided to dry the plant as a whole, with the largest leaves removed, I can't provide any weight yet, but I will submit the dry weight later on.
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New-Falkenburg
New-Falkenburg commentedweek 152d ago
Congrats! Well deserved. 20y ago at SensiSeedShop Rotterdam I had the opportunity to get some JH and whoooo, that was the best I've ever smoked. Rolled a joint in hotel room, two puffs and I was barely able to lay it back to the ashtray. Same an hour later..... Got now some seeds as well for next run. Enjoy!
GroloCup
GroloCup commentedweek 111mo ago
That's almost artwork! Beautiful
billycardine0420king
I chose this strain from Sensi as well
Paflucy
Paflucy commentedweek 1313d ago
Calmag from Biobizz is very weak and takes a long time to be absorbed. When I worked my way up to 3 ml/L and it still didn’t help, I just gave up. I switched to Calmag from BAC and the problem disappeared immediately. And when you’ve got magnesium deficiencies, potassium won’t be absorbed either. Good luck!
zorn_des_kinski
zorn_des_kinski commented13d ago
@Paflucy, thanks for the advice, I'm gonna keep that in mind :)
Versize
Versize commentedweek 52mo ago
I'll be following this as we are almost on the same trajectory time wise on the same seeds. Yours is looking mighty fine. Very cool technique. I see my training is far les structured.
zorn_des_kinski
zorn_des_kinski commented2mo ago
@Versize, I just followed your report as well :) I don't try mainlining to increase my yield but simply because I like the challenge of trying something new. And it will for sure be interesting to compare the plants development
Versize
Versize commented1mo ago
@zorn_des_kinski, I'm also still figuring out the whole grow diaries. Just saw many of my notifications. Yours is doing fine considering it hasn't been fed for a while. A smaller plant like that at least transpires a lot less water, so has it's perks. And I agree. Since I started growing I just try different techniques, just for the sake of fun. It's an hobby after al.
Enochian
Enochian commentedweek 1312d ago
Awesome grow dude. Just started one of these as an auto.
Inganjawetrust
Inganjawetrust commentedweek 1314d ago
Killer colas !!
Selkot
Selkot commentedweek 1215d ago
really nice HST & LST !
vyndalin
vyndalin commentedweek 82mo ago
very nice main-lining
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