Slow grow auto flower? ..... deficiency?

2RILLA · May 1, 2025

So a few weeks on and some developments but not sure what's happening with the yellowing leafs and also at the end of week 9 how long will this grow take ?should be 11 weeks but I don't think it will be ready ...been feeding bio bizz nutrients in soil as recommended and changed to a mars hydro Ts 1000 instead of the 600w HP's and now have a large dehumidifier so heat and humidity have been on point any advice would be great...thanks
P s main cola broke I fixed it with tape and cardboard seems to have worked

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LoveGrowingIt · May 1, 2025

It looks like it revegged. The single-blade leaves indicate it. It's caused by light leakage. It should finish okay if the light stays on the flowering schedule. I've never had a plant reveg, though, so I'm only going by what I've read.

Bobcat.Branch · May 1, 2025

LoveGrowingIt said:
It looks like it revegged. The single-blade leaves indicate it. It's caused by light leakage. It should finish okay if the light stays on the flowering schedule. I've never had a plant reveg, though, so I'm only going by what I've read.

I think they said it was an auto.

I feel like popping auto seeds is basically just spinning the big wheel and wherever it lands is what you got... A dud, a stud, some buds, or a janky lanky with no stanky!

2RILLA · May 2, 2025

Bobcat.Branch said:
I think they said it was an auto.

I feel like popping auto seeds is basically just spinning the big wheel and wherever it lands is what you got... A dud, a stud, some buds, or a janky lanky with no stanky!

Thanks for the comment but kinda unhelpful

LoveGrowingIt said:
It looks like it revegged. The single-blade leaves indicate it. It's caused by light leakage. It should finish okay if the light stays on the flowering schedule. I've never had a plant reveg, though, so I'm only going by what I've read.

Yea they are auto flowers but had some heat and humidity issues early on so may have affected the growth

Bobcat.Branch · May 2, 2025

2RILLA said:
Thanks for the comment but kinda unhelpful

Well, have a day then. That's it, just a day.

RoadKillSkunkHunt · May 2, 2025

2RILLA said:
Thanks for the comment but kinda unhelpful

Yea they are auto flowers but had some heat and humidity issues early on so may have affected the growth

It looks like the heat and humidity played a part. I'm also wondering about your plants nutrition. It looks to me like they were struggling to uptake nutrients. Tell me in detail about your watering/feed routine. I saw the nutrient line you're using but I wonder about your soil pH.

Galgrows · May 2, 2025

I think the light is only 100watts? Could of been partly to blame?

RoadKillSkunkHunt · May 2, 2025

Galgrows said:
I think the light is only 100watts? Could of been partly to blame?

It could be ... Plants still don't look that healthy. Color is off. There's some rust colored spots that is either showing a calcium deficiency or over-watering. If the light is only 100 watts, it's not going to grow fast ... but there's more going on than just that.

Galgrows · May 2, 2025

RoadKillSkunkHunt said:
It could be ... Plants still don't look that healthy. Color is off. There's some rust colored spots that is either showing a calcium deficiency or over-watering. If the light is only 100 watts, it's not going to grow fast ... but there's more going on than just that.

true that something is the issue i wonder how long this has been going on?

RoadKillSkunkHunt · May 2, 2025

Galgrows said:
true that something is the issue i wonder how long this has been going on?

We're going to have to wait to hear back from the OP ... You're right about the light if its only 100 watts. If I were to guess, the rest of the problem would be due to over-watering (watering too frequently). It acidifies the soil and one of the first things it effects is uptake of calcium. Nutrient line is solid so I don't think it lacks there. The almost grey-ish look it has suggests the roots are not getting enough O2 due to always having wet feet.

2RILLA · May 2, 2025

RoadKillSkunkHunt said:
It looks like the heat and humidity played a part. I'm also wondering about your plants nutrition. It looks to me like they were struggling to uptake nutrients. Tell me in detail about your watering/feed routine. I saw the nutrient line you're using but I wonder about your soil pH.

Ok grew the plants in soil with 20% perlite started nutrients at 5 weeks watering every 3 days because of the heat from the 600w HP's plants were drying quick and as the palt grew became every 2 days I was using the recommended dose of nutes had a broken main cola so fixed it with tape I water with nutes and then the next watering I use just water but there was a time period of about a week when I wasn't getting any run off not sure if I was watering enough but the past two week I've been getting some run off after watering 5ltr water always PhD to 6.8 and soil pH never past 7.4

2RILLA · May 2, 2025

Galgrows said:
I think the light is only 100watts? Could of been partly to blame?

Hi the light is 150w and only been using it for 1 week has been under 600whps most of its life I think I posted some pictures about two weeks ago on my feed I was asking for advice but didn't hear back the problems started around then

2RILLA · May 2, 2025

Galgrows said:
true that something is the issue i wonder how long this has been going on?

I think the issue has been going for about two weeks hear are some pictures of a few weeks ago

RoadKillSkunkHunt · May 2, 2025

2RILLA said:
I think the issue has been going for about two weeks hear are some pictures of a few weeks ago

I see what you're saying. They did look healthier a few weeks ago. Have you been using cal-mag? Have you cut way back on the nitrogen? Bio-biz is not the line I use but it does seem to have a decent reputation.

Calcium needs go through the roof at about the 2.5-3 week point in flowering. It can happen quickly too.

2RILLA · May 2, 2025

RoadKillSkunkHunt said:
I see what you're saying. They did look healthier a few weeks ago. Have you been using cal-mag? Have you cut way back on the nitrogen? Bio-biz is not the line I use but it does seem to have a decent reputation.

Calcium needs go through the roof at about the 2.5-3 week point in flowering. It can happen quickly too.

So I was using biobizz grow 4ml a ltr and when I went into flower I cut back to 2ml per ltr and now using biobizz bloom and top max but yes have cut back slightly should I go back to 4 ml ? Also I can go back to the 600 w light I'll just need to manage the humidity?
(Thanks for your help )

RoadKillSkunkHunt · May 2, 2025

2RILLA said:
So I was using biobizz grow 4ml a ltr and when I went into flower I cut back to 2ml per ltr and now using biobizz bloom and top max but yes have cut back slightly should I go back to 4 ml ? Also I can go back to the 600 w light I'll just need to manage the humidity?
(Thanks for your help )

I'm not sure changes at this stage is going to change a whole lot. From a yield standpoint, its pretty much been set. The buds won't grow much more in size but they should still fatten up. Next grow, keep the nitrogen level higher for another week or so before you begin to taper it back. If you have not been using cal-mag, you should start using it once your plants are in flower... or any time in veg that they begin to show calcium deficiencies.

Soil pH ideally should be about 6.5.

Edit: Here's a graph that tells you when each element peaks.

2RILLA · May 2, 2025

RoadKillSkunkHunt said:
I'm not sure changes at this stage is going to change a whole lot. From a yield standpoint, its pretty much been set. The buds won't grow much more in size but they should still fatten up. Next grow, keep the nitrogen level higher for another week or so before you begin to taper it back. If you have not been using cal-mag, you should start using it once your plants are in flower... or any time in veg that they begin to show calcium deficiencies.

Soil pH ideally should be about 6.5.

Edit: Here's a graph that tells you when each element peaks. View attachment 2426405

Ok cool we'll its good to have a idea were I went wrong I've got 3 massive photos that have been veging for 6 weeks or so now and will go untill this is finished then I'll flip lights I'll definitely get some cal -mag and take your advice onboard and keep the soil pH in check for the next grow and thanks for the graph and help

RoadKillSkunkHunt · May 2, 2025

2RILLA said:
Ok cool we'll its good to have a idea were I went wrong I've got 3 massive photos that have been veging for 6 weeks or so now and will go untill this is finished then I'll flip lights I'll definitely get some cal -mag and take your advice onboard and keep the soil pH in check for the next grow and thanks for the graph and help

I'm not sure I would say you went "wrong." Your flowers will finish and if you don't cut too soon, they should still be good. The pointers I gave should help you improve but quite frankly, you didn't do too bad a job at all. Autos have such a short window of opportunity. If you miss it, your yield goes down. The guy who you accused of not being helpful did tell you the truth. Autos are unpredictable. Photos are much more predictable and you can fix problems in veg prior to putting them into flower. You don't have that ability with an autoflowering plant.

gwindajoannhare · May 2, 2025

Bobcat.Branch said:
Well, have a day then. That's it, just a day.

Hey mine can reveg 4 times if it wants as long as it looks that good when done.ill take them honey if you are tired of them.

Bobcat.Branch · May 2, 2025

gwindajoannhare said:
Hey mine can reveg 4 times if it wants as long as it looks that good when done.ill take them honey if you are tired of them.

I'm not even sure what you're talking about. I've never had a plant reveg on me unless I did something to trigger it.

Slow grow auto flower? ..... deficiency?

Slow grow auto flower? ..... deficiency?

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