20/4 vs 24/0 π‘
Soil
Soil
Perlite
Indoor
Room Type
11 l
Pot Size
2 l
Watering
Start at Harvest
G
Germination3mo ago
valiotoro This run is a side-by-side experiment to compare two different light schedules on autoflowers: 20 hours of light (20/4) versus 24 hours of light (24/0).
The goal is to see if running 24h of continuous light actually improves growth, yield, and overall plant health compared to a more traditional 20/4 cycle.
Both plants are grown under the same conditions:
β’ Same genetics
β’ Same medium
β’ Same nutrients
β’ Same environment (temperature, humidity, airflow)
The only variable in this grow is the light cycle.π‘
Letβs find out: is 24/0 really worth it, or is 20/4 the sweet spot for autoflowers?
I already have my own opinion on this, and I believe that under 24/0, even the smallest mistake can hit hard and show up fast. This run will confirm (or challenge) that ideaβ¦π
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18 comments
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Used method
Glass Of Water
Germination Method
1
Week 1. Vegetation3mo ago
6 cm
Height
24 hrs
Light Schedule
25 Β°C
Day Air Temp
6.5
pH
700 PPM
TDS
55 %
Air Humidity
22 Β°C
Solution Temp
20 Β°C
Substrate Temp
20 Β°C
Night Air Temp
11 l
Pot Size
0.5 l
Watering Volume
30 cm
Lamp Distance
Nutrients 2
DryPart Grow
0.8 mll
Pro Roots
0.2 mll
valiotoro Week one is done βοΈ
So far, no major differences both are growing at exactly the same pace.
No signs of leaf burn or light stress.
The substrate is drying a bit faster on the 24h one, which is totally normal.
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2 comments
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2
Week 2. Vegetation2mo ago
6 cm
Height
24 hrs
Light Schedule
25 Β°C
Day Air Temp
6.5
pH
700 PPM
TDS
55 %
Air Humidity
22 Β°C
Solution Temp
20 Β°C
Substrate Temp
20 Β°C
Night Air Temp
11 l
Pot Size
0.5 l
Watering Volume
30 cm
Lamp Distance
Nutrients 2
DryPart Grow
0.8 mll
Pro Roots
0.2 mll
valiotoro End of week 2 π
No noticeable differences yet between them.
I bumped the light up to 60% on the 20/4 schedule.
The 24/0 is still running at 40% to keep things stress-free for now.
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2 comments
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3
Week 3. Vegetation2mo ago
20 cm
Height
24 hrs
Light Schedule
25 Β°C
Day Air Temp
6.5
pH
55 %
Air Humidity
22 Β°C
Solution Temp
20 Β°C
Substrate Temp
22 Β°C
Night Air Temp
11 l
Pot Size
0.5 l
Watering Volume
30 cm
Lamp Distance
Nutrients 2
DryPart Grow
0.8 mll
Pro Roots
0.2 mll
valiotoro Theyβre deep in the stretch phase, so bud sites should start forming very soon. Iβm lucky to be running two identical phenotypes for this test, which is ideal.
Still canβt spot any real difference between themβ¦
24 likes
2 comments
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4
Week 4. Vegetation2mo ago
20 cm
Height
24 hrs
Light Schedule
25 Β°C
Day Air Temp
6.5
pH
900 PPM
TDS
55 %
Air Humidity
22 Β°C
Solution Temp
20 Β°C
Substrate Temp
22 Β°C
Night Air Temp
11 l
Pot Size
1 l
Watering Volume
30 cm
Lamp Distance
Nutrients 2
DryPart Grow
0.8 mll
Pro Roots
0.2 mll
valiotoro Insane vigor! Buds are stacking all over this is looking like itβs going to be a top harvest.
The aroma is already coming through strong, sweet candy with a spicy twist π€€
The plant under 24/0 is showing roughly 15% more bud development compared to the 20/4.π₯
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5 comments
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5
Week 5. Flowering2mo ago
20 cm
Height
24 hrs
Light Schedule
25 Β°C
Day Air Temp
6.5
pH
1000 PPM
TDS
55 %
Air Humidity
22 Β°C
Solution Temp
20 Β°C
Substrate Temp
22 Β°C
Night Air Temp
11 l
Pot Size
1 l
Watering Volume
30 cm
Lamp Distance
Nutrients 2
DryPart Bloom
0.8 mll
Pro Bloom
0.2 mll
valiotoro Letβs gooo, flowering has officially started hehe!π₯
The one under 24h light is slightly ahead in bud formation.No signs of light stress, so weβre keeping it going.π
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comments
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6
Week 6. Flowering2mo ago
20 cm
Height
24 hrs
Light Schedule
25 Β°C
Day Air Temp
6.5
pH
1000 PPM
TDS
55 %
Air Humidity
22 Β°C
Solution Temp
20 Β°C
Substrate Temp
22 Β°C
Night Air Temp
11 l
Pot Size
1 l
Watering Volume
30 cm
Lamp Distance
Nutrients 2
DryPart Bloom
0.8 mll
Pro Bloom
0.2 mll
valiotoro All good so far!
The terps are already really nice reminds me of rhubarb with a spicy twist π€€
Both plants are in perfect health with no signs of stress at all, so Iβm going to keep increasing the intensity and push it up to 80%.
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5 comments
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7
Week 7. Flowering2mo ago
70 cm
Height
24 hrs
Light Schedule
25 Β°C
Day Air Temp
6.5
pH
1000 PPM
TDS
55 %
Air Humidity
22 Β°C
Solution Temp
20 Β°C
Substrate Temp
22 Β°C
Night Air Temp
11 l
Pot Size
2 l
Watering Volume
30 cm
Lamp Distance
Nutrients 2
DryPart Bloom
0.8 mll
Pro Bloom
0.2 mll
valiotoro Week 7 hehe everythingβs on point buds are stacking nicely and the terps are coming through super loud!
Temps are pushing the limit a bit, but Iβve never used AC and Iβm definitely not about to start now π
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4 comments
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8
Week 8. Harvest14d ago
Happy Harvest Day!
10/10
Rated
Stay Here 4 Life
Damn, the finish is incredible!!
The goal of this run was to test the best light schedule for autos, and from my point of view, 20/4 is more than enough! (Maybe 24/0 with COβ supplementation could be worth it.)
With 20/4, the plant gets a bit of time to recover, and she wonβt hold a couple of small mistakes against you.
The last few weeks I had temperatures above 30Β°C in the tent, but they handled it really well.
If youβre looking for a great sativa with an amazing cerebral high and candy-like terps, this is THE strain to choose.
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Spent 51 days
Ger Veg Flo Har
870 g
Bud wet weight per plant
1
Plants
3.81 mΒ²
Grow Room size
Easy
Difficulty
Height
Day air temperature
Air humidity
PPM
PH
Light schedule
Solution temperature
Night air temperature
Substrate temperature
Pot size
Lamp distance
valiotoro The buds are incredible for an auto, and in such a short time, itβs just unbeatable!π₯
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1 comment
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Equipment Reviews
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RasendeRollo92 commentedweek 03mo ago
I love Experiments ! Thanks for Running This diary ! Nice Strain of Choice πππ
likes 5
valiotoro commented3mo ago
@RasendeRollo92, thank you buddy have a good one π
likes 3
FatnastyzBudz commentedweek 03mo ago
After you start the 24 hrs, how long rill you slowly decrease to flip? Lose 4 hrs a week?
likes 2
MonyetDiablero commented3mo ago
@FatnastyzBudz, just 24/0 no flip as it is a auto needed he will create a monster πͺπͺπͺ
likes 2
FatnastyzBudz commented3mo ago
@MonyetDiablero, ππππ
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valiotoro commented3mo ago
@MonyetDiablero, π¦π¦π¦
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MonyetDiablero commentedweek 71mo ago
Still going strong brother πππ
likes 2
valiotoro commented1mo ago
@MonyetDiablero, thank you bro β€οΈβ€οΈ
like 1
Xonidan commentedweek 03mo ago
Good run for your Lady π
likes 2
valiotoro commented3mo ago
@Xonidan, thank you xoxo π
likes 2
Kali_flauer commentedweek 03mo ago
Very interested to see the results! I have 3x Amnesia Z seeds that I planned on running this summer and I will be taking notes π€.
likes 2
valiotoro commented3mo ago
@Kali_flauer, ππ
likes 2
Kali_flauer commentedweek 03mo ago
I agree though with your prediction. I think 24/0 has the potential to result in greater yields, but carries greater risks.
likes 2
valiotoro commented3mo ago
@Kali_flauer, Yeah exactly .. Will see π
likes 2
Marijuanaut commentedweek 03mo ago
Great idea... curious to see your results! I've done a few 20/4 cycles and noticed that, although you may get more flowers, you will definitely have more work, stress, electrical bills to pay, etc... and I just didn't find it worth it! But then again I never went full retard (sorry, loving the movie references in your diaries and couldn't help it) haha
DonΒ΄t know man, but feel like the real benefit I see in longer flowering cycles is during cold winters to stabilize the temp.
likes 2
valiotoro commented3mo ago
@Marijuanaut, Yeah, true there are pros and consβ¦ weβll have to see the total weight at harvest to know if itβs really worth it or not. And running 24h nonstop isnβt great for the lamp either haha
#afterhours π
likes 3
FatnastyzBudz commentedweek 62mo ago
Shes great bro! Think you could update her height? We'd all like to know her size!
like 1
valiotoro commented2mo ago
@FatnastyzBudz, πππnext year
like 1
FatnastyzBudz commented2mo ago
@valiotoro, π‘π‘π‘
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LueRootsGrowGermany commentedweek 42mo ago
Sehr hΓΌbsch ;-)
like 1
valiotoro commented2mo ago
@LueRootsGrowGermany, thank you π
like 1
LueRootsGrowGermany commented2mo ago
@valiotoro, sehr gerne ππ
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FatnastyzBudz commentedweek 72mo ago
they run a lot of electric, I dont blame you.
like 1
valiotoro commented1mo ago
@FatnastyzBudz, ππππ
likes 2
MonyetDiablero commentedweek 62mo ago
πͺπͺπͺ She is going strong π
like 1
valiotoro commented2mo ago
@MonyetDiablero, thank you my g ππ
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MonyetDiablero commentedweek 42mo ago
These 15% will increase i promise. Buds will be harder and will gain more weight !
like 1
valiotoro commented2mo ago
@MonyetDiablero, oooh yes π―
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MonyetDiablero commentedweek 32mo ago
Both going strong brother !π
like 1
valiotoro commented2mo ago
@MonyetDiablero, thank you my g ππ
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FatnastyzBudz commentedweek 22mo ago
BOOM!
like 1
valiotoro commented2mo ago
@FatnastyzBudz,
like 1
MonyetDiablero commentedweek 12mo ago
πͺπͺπͺ Going strong brother π
like 1
valiotoro commented2mo ago
@MonyetDiablero, oooooh yes my g π₯π₯π₯
likes
MonyetDiablero commentedweek 03mo ago
Lol bro , if i can do it you definitely can do it. You bucket size will the only limit you have besides the 42 strain π€£( joke) Cant wait to see her growing Bro !
like 1
valiotoro commented3mo ago
@MonyetDiablero, Ahaha πππ
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FatnastyzBudz commentedweek 812d ago
Lets go!!
Just in time!
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Fast_Buds 
commentedweek 03mo ago
Hi there, thank you for running this diary. We look forward to your updates. Happy growing π±π± & Good luck π
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