The Grow Awards 2025 🏆
Start My Diary
Start My Diary
Login
Sign Up
Login
Start My Diary
Home
Diaries
Shorts
Questions
Contests
Growers
Strains
Seeds
Breeders
Nutrients
Lights
Equipment
Blog
English
Espanól
Русский
Deutsch
ไทย
Login
Start My Diary
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Chat
By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms
Accept
Back to Grow Questions
CO2 and PPFD
DutchGuy01
started grow question 2 years ago
Grow schedule per week: Which CO2 ppm in relation with light PPFD?
Solved
Other. General questions
likes
DutchGuy01
answered grow question 2 years ago
Posted new question
likes
Complain
Selected By The Grower
Ctrellis90
answered grow question 2 years ago
Generally only use co2 if you're using HPS bulbs because of the amount of heat stress they put your plants under.
1 like
Complain
Ctrellis90
answered grow question 2 years ago
Co2 correlates with temperature not light conditions. 85-90 degrees F. 1200-1500 ppm co2
1 like
Complain
Similar Grow Questions
Solved
MiistrH
Trichomes ripe?
Would you harvest already or not?
Other. General questions
a month ago
9
3
Solved
Larko
Question about the site search function
Newbie here. Is there a way to search for a list of how much a particular seed has yielded by growers?
Other. General questions
a month ago
6
2
Solved
Rogar13
Hello again, in my previous question they told me to throw away the plant? It is true that I have a closet next to it with plants in 4 weeks of flowering. But couldn't you remove the affected leaves and spray mushroom insecticide?
Other. General questions
a month ago
6
4
Solved
Rogar13
Hello, could someone help me? I wanted to switch the plant to flowering but as you can see it has spots on the leaves, the spots are only dark and on some large leaves without chlorosis or burnt leaves. I was watering with water at 6ph, it has some guano and soil all mix
Other. General questions
a month ago
5
Solved
Rogar13
I wanted to ask if you think this plant has mold or if it's just a major deficiency due to a blockage. I have an indoor plant next door with some plants growing with dark spots, it's in my previous question. Sorry for giving more information, I don't know what would help.
Leaves. Color - Dark-brown
Other. General questions
a month ago
1
Solved
Growerxm00
Ready to harvest or not?
So is it ready to harvest or not? The pistills seems 100% brown but when I look at the trichomes it seems a bit clear yet, what are your opinions?
Buds. Other
Other. General questions
Setup. Strains - Photoperiod
25 days ago
4
3
Solved
Schlurpypurpey
Pollen sacs?
Is this early signs of Pollen sacs staring me down?
Week 6
Other. General questions
a month ago
5
4
Solved
EL_Papi
Ernten oder nicht?
Hi meint ihr das ich sie ernten kann? Bin ziemlich ungeduldig,habe aber aber kein mikroskop nur Fotos von handy. Sehen viele trichome weiß aus,aber will sie nicht zu früh schneiden. was meint ihr?
Week 4
Leaves. Color - Dark-purple
Other. General questions
a month ago
3
3
Solved
Schlurpypurpey
Still new to this, to me this is starting to look like pretty clear early signs of pollen sacs, is it a boy or still too early to tell?
Week 7
Other. General questions
Plant. Other
13 days ago
3
7
Solved
Alsterly
Are (constantly) high daytime temperatures a huge problem in flower?
My day temperature since turing my light up to max during flower are reaching 29-30c | 84.2 - 86f, while the daytime RH is at roughly 40% - 50%. Is the high temperature something to be concerned about? pics 1 and 2 are the exact same data as pics 3 and 4, just set to c/f each.
Week 11
Other. General questions
Plant. Other
Setup. Ventilation
13 days ago
1
Solved
XanHalen
Do these girls look ready from monster bloom?
Does this stage look right to start using monsterbloom 1-2 times fer week?🙏👌🙌 They handle very well to aggressive feeds, runoff was 4000ppm, not a single sign of overfeeding, That issue has been resolved, want to beef up the cake.
Week 6
Buds. Other
Other. General questions
9 days ago
7
4
Solved
XanHalen
runoff PPM elevated, how does this approach sound...
Watering till runoff now... runoff ppm was 2500+... Will be using very mild nutes to flush over 1 - 3 feeds... or until I am near my input, does this sound like an ok idea?
Week 6
Other. General questions
Setup. Strain - Autoflowering
Feeding. Other
11 days ago
8
7
Solved
SativaGrow
Help ID this Sativa: Jordanian Landrace? (Fruity Lemon, Pine, Gas, Hash Terps) 🌿
1. Does this terp profile/structure match any known Middle Eastern landraces? 2. Could this be a Jordanian/Syrian Hash Plant hybrid? 3. Any strains with similar fruity lemon/pine/gas/tangy/old school hashish terps?
Week 3
Other. General questions
Other. Other
Plant. Other
4 days ago
1
8
Solved
XanHalen
Progressive rusty spots on leaves
been upping calmag .5 each feed, still getting worse, if not calcium deficiency... what is it? should i keep upping calmag? running 2ml/gal currently. bud development is still good, not stunted, good structure and trichomb production, great smell.
Week 7
Leaves. Color - Dark-brown
Other. General questions
Feeding. Deficiences
2 days ago
18
10
Solved
sellem
BioBizz Microbes PH Question
It says to adjust PH AFTER adding biobizz microbes. if i adjust to lets say 6,5, adding microbes will raise it to way over 7. that normal, that ok? or should i adjust it back down after? or add microbes first, then adjust down? im confused!
Other. General questions
Feeding. Other
4 months ago
7
7
Solved
Growerxm00
Transplant and lst
Hey, so I transplanted this grow 1 day ago, I’m waiting for it to watch if it doesn’t cause much stress on the plants, my question is if I can start topping soon like in 5 days or so and then move on to lst, what do you think? I have 4 plants.
Other. General questions
Plant. Other
Techniques. Topping
4 months ago
6
5
Solved
jeannoTapin
Discolored edges
Hey Guys, Fourth grow and first time this is happening to me. Some leaves are discolored and it looks like it starts from the edges. What could be the cause for such problem?
Week 3
Leaves. Edges burnt
Other. General questions
4 months ago
6
4
Solved
tangie
How many days till harvest please? (It's close)
Fine-tuning my timing, my 2nd harvest. Looking for mostly Sativa effects but slight chill is ok to balance the acid-like high — 10-15% amber tx? 90% of pistils are orange/brown now. Feeding with 60-70% flowering mix, but only 50% N. Lens is Apexel 200X + iPhone, no affiliation
Week 13
Buds. Other
Other. General questions
3 months ago
4
5
Solved
tangie
Timing a 7d flush — will it over-ripen if I begin flushing when it's ready for harvest and keep it for 1 more week on flush juice?
Need advice on timing a 7d flush. My 2nd grow, both (Sativas) flowered signif. longer than advertised (+2-4 weeks). To know when to start flushing, do you visually estimate when a plant is no more t 1wk from harvest? If I start flush when it's ripe for harv, too late or ok?
Week 13
Other. Harvest - Drying
Other. General questions
4 months ago
8
10
Solved
tangie
Can I use this as a Hanukkiah 🕎, or only if Kosher Kush? Thx
Asking for a friend Merry Christmas everyone, whatever your faith or belief or philosophy or way of being 🙏🏽🌲
Week 15
Other. General questions
3 months ago
9
6