how much does grow condition affect flower time?

in the past most of my grows were ready around day 63 to 67 of flower.
my last one went to f78 and it could have gone longer, but i took the earliest looking of them at day 64/65 and they were ready. i was running hybrid (3x liberty haze and 2x banana sapphire) and indica strains (2x purple punch). The indicas went the long. the liberty haze didn't stretch much. the purple punch stretched for weeks and almost took over the tent.

this grow about half of my plants look ready at day 51. i am running 7 strains that cover a wide range of sativa to indica genetics. i may even take a few at day 56. my durban poison will probably be done before f63 with the tikal looks like it will be ready by 70 or before. i budgeted 90 days in flower to cover the tikal and durban. this seems super weird. so, the only plant that stretched was the bubblegum from thseeds. the durban did a tiny bit and so did the red hot cookies. the other plants didnt' stretch at all.

besides strains, the major difference has been some ph issues due to a bad pen this time around, there was very little stretching, i did a lot more lst than last time and ambient temp differential between night and day was very small, unlike all previous grows. my last grow had about a 12 to 9 degree difference.

Pics of plants ready at day 51?

It matters some, but not all.

I have two plants of the 'same' genetics, same strain right now. One as of this week is ready for harvest (literally no white pistils, fully bulked, etc.). The other (which has had some mutant tendencies) is about 2 weeks behind that one. They're inches from each other, have the exact same conditions and light.

A LOT, actually.

My current grow took 20 days to show flower, because VPD was below .9 and lights-on temp was about 70° average. Added a heater to the room which brought temps to mid 70s and flowers showed within 2 days of that.

Nope_49595933949 said:

Pics of plants ready at day 51?

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I'm running Chocolope (Victory's version called Chocodope) and I'm nearly to harvest (another week or so) and I'm sitting at day 139 from germination.

Grow conditions, esspecially temps, can drastically effect plant growth including slowing it down. I’ve had clones I ran for years take 2-3 weeks longer then they were supposed to because of a cold snap I couldn’t manage well. Once I got the temps fixed they went back to growing normally.

I was just talking about this today- I believe it is a critical element for good growth-
Possibly the most important as plants don’t grow outside of their recommended zones very good- no matter what you may feed them or how much sunlight they get.

Thundercat said:

Grow conditions, esspecially temps, can drastically effect plant growth including slowing it down. I’ve had clones I ran for years take 2-3 weeks longer then they were supposed to because of a cold snap I couldn’t manage well. Once I got the temps fixed they went back to growing normally.

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I see it with seed germination too. My seeds that just popped in 24 hours were at 82 degrees. These plants love their warmth!

Rurumo said:

I see it with seed germination too. My seeds that just popped in 24 hours were at 82 degrees. These plants love their warmth!

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They can take warmer! A warm day with the sun beating down on the soil makes it in the 90’s if not more.

Too hot will slow shit down just as too cold can do the same.

My experience is that cold has a more drastic effect in rate of growth/ripening than hot does.

I have seen my plant slow to a crawl in the low 60 degree day time / 45 degree night.

While during 100 degree heat wave although they still slowed it was not near as drastic as the cold.

Do what you want with this answer lol. Because I'm not sure it helped.

Wizzlebiz said:

Too hot will slow shit down just as too cold can do the same.

My experience is that cold has a more drastic effect in rate of growth/ripening than hot does.

I have seen my plant slow to a crawl in the low 60 degree day time / 45 degree night.

While during 100 degree heat wave although they still slowed it was not near as drastic as the cold.

Do what you want with this answer lol. Because I'm not sure it helped.

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Nah man that helps. Builds upon a couple other answers, and I can concur personally as that's happened to me, too.

I seen somewhere there was an analogy of a barrel, each vertical plank of the barrel represented a variable. So if one thing is drastically off (plank was shorter) the barrel would only fill up to that point. I’m too stoned to articulate how this transfers to variables in a grow room, but you probably get it.

Blue brother said:

I seen somewhere there was an analogy of a barrel, each vertical plank of the barrel represented a variable. So if one thing is drastically off (plank was shorter) the barrel would only fill up to that point. I’m too stoned to articulate how this transfers to variables in a grow room, but you probably get it.

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More accurately, if you increase ONE variable (more light) you must ALSO increase ALL THE variables; temp, watering frequency, RH, CO2 levels, etc etc. Dr. Bruce Bugbee explains it better than me

PopAndSonGrows said:

More accurately, if you increase ONE variable (more light) you must ALSO increase ALL THE variables; temp, watering frequency, RH, CO2 levels, etc etc. Dr. Bruce Bugbee explains it better than me

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I was thinking it might of been him haha

Wizzlebiz said:

Too hot will slow shit down just as too cold can do the same.

My experience is that cold has a more drastic effect in rate of growth/ripening than hot does.

I have seen my plant slow to a crawl in the low 60 degree day time / 45 degree night.

While during 100 degree heat wave although they still slowed it was not near as drastic as the cold.

Do what you want with this answer lol. Because I'm not sure it helped.

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I'm glad you mentioned this. I actually experienced the opposite. So, maybe it's what you thought. When my tent was like 76f to 82f in the summer i had the slower flowering times and with it running 58f to 72f during the fall it was a bit faster. Nothing conclusive either way I suppose.

Splinter7 said:

I'm glad you mentioned this. I actually experienced the opposite. So, maybe it's what you thought. When my tent was like 76f to 82f in the summer i had the slower flowering times and with it running 58f to 72f during the fall it was a bit faster. Nothing conclusive either way I suppose.

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What.? That doesn't make any sense. Metabolism slows as temps decrease. That's basic knowledge.
'The chemical reactions involved in photosynthesis are controlled by enzymes. As with any other enzyme-controlled reaction, the rate of photosynthesis is affected by temperature.

At low temperatures, the rate of photosynthesis is limited by the number of collisions between enzymes and substrate. As temperature increases the number of collisions increases, therefore the rate of photosynthesis increases. However, at high temperatures, enzymes are denatured and this will decrease the rate of photosynthesis'

Jjgrow420 said:

What.? That doesn't make any sense. Metabolism slows as temps decrease. That's basic knowledge.
'The chemical reactions involved in photosynthesis are controlled by enzymes. As with any other enzyme-controlled reaction, the rate of photosynthesis is affected by temperature.

At low temperatures, the rate of photosynthesis is limited by the number of collisions between enzymes and substrate. As temperature increases the number of collisions increases, therefore the rate of photosynthesis increases. However, at high temperatures, enzymes are denatured and this will decrease the rate of photosynthesis'

Factors affecting photosynthesis - Photosynthesis - Edexcel - GCSE Combined Science Revision - Edexcel - BBC Bitesize

Revise photosynthesis with BBC Bitesize for GCSE Combined Science

www.bbc.co.uk

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the plants in the colder grow were smaller, ate less and have less yield. so, yes, less photosynthesis. not sure i see your point. perhaps the flower time isn't related to photosynthesis in the same way as everything else.