So far so good. Anything I should be aware as my auto is beginning to flower now?

[Markyb]

Hi! My first auto (and my very first plant ever) is in preflower if I am correct? I see pistils appearing on upper nodes and at the ends of all branches.
I think she looks healthy and is size wise is in the ballpark with the strain specs. She is now 32days, 40cm [1.3ft] tall and growing every day. The strain specs (Quick one) estimates final height of 50-60cm [1.6 - 2ft] for indoor grow.

Currently the tent temp has been around 26-27C (~79-81F) and RH between 45-50% depending on the time of the day. Lights off temp has been around 3-4 degree lower than lights-on temp.
Four days ago I fed her with 50/50 veg/bloom nutrients. (but of course not exceeding the total recommended amount) I read somewhere that I with autos I should keep some amount of veg in their feed even when full flower, like 1/3th veg and 2/3 bloom. Is this true?

100W Full spectrum LED is ~50cm (19") above the top of the plant. With 80% power. Measured the light amount being ~40DLI at the moment.

I used to have to water her every 3-4 days but now I have had to water her every 2 days. (Pot get very very light pretty fast)

Is there anything I should be prepared for, or any parameters I should change, temp, RH or lights?
I have understood that when she is in full flower I need to bring down the RH and temps, but I'm kind of loss what is recommended for beginning of flowering.

Thank you for any advice!

 

[Bigalmoby]

Looking good I would for sure keep the veg nutes till almost finished I have made the mistake of not doing it and ended up with lots of yellow from lack of N

 

[Bigalmoby]

They also tend to drink a lot in flower and when that slows down your near the end

 

[Markyb]

Looking good I would for sure keep the veg nutes till almost finished I have made the mistake of not doing it and ended up with lots of yellow from lack of N

Thanks! I will keep veg nutes in the feed.

About the feeding schedules. Do the nutrient amount shown in manufacturers charts meant for once a week?
I use Canna Terra Vega / Canna Terra Flores, and the the chart shows ratio of 2-3mL/L for week 1 of flowering for example. Does this mean I feed the plant once with the solution or more than once? I know I should not use nutrients on every watering, and so far I have only fed the plant once a week but now that she requires more waterings than before I'm unsure if I should also add the amount of feeds.

 

[marzig]

Great looking plant!
I would suggest gradually raising your RH closer to 60 to 65% to reduce your VPD if possible. When you have time, a little research on VPD will put you miles ahead.

 

[Markyb]

Great looking plant!
I would suggest gradually raising your RH closer to 60 to 65% to reduce your VPD if possible. When you have time, a little research on VPD will put you miles ahead.

Thank you! I did have the RH around 65% earlier. I was under the impression that I should begin to slowly decrease the RH and that's why I had brought it down to 50%. I will bring up the RH back to 60% or so. 60 at the moment is easy to achieve and maintain.

At which point should I start bringing the RH down? I think the flowers have already started forming up?

I have tried reading alot about VPD but every article appears to give different information so I'm kinda confused on what is correct.

 

[marzig]

Thank you! I did have the RH around 65% earlier. I was under the impression that I should begin to slowly decrease the RH and that's why I had brought it down to 50%. I will bring up the RH back to 60% or so. 60 at the moment is easy to achieve and maintain.

At which point should I start bringing the RH down? I think the flowers have already started forming up?

I have tried reading alot about VPD but every article appears to give different information so I'm kinda confused on what is correct.

Yes there's tons of info and opinions out there. White pistols or stigmas are indicating very early pre-flower.

A lot of people will stay at 80 and 60% through out their grow which with a 2 degree leaf offset is 1.17 VPD. I like to keep it near 1.0 during pre-flower and increase to 1.20 in mid-flower. Towards the end I start dropping my temp to 75 and RH to 50% which is around 1.3.

Another thing that has much debate is light schedules with autos. I'm in the 24/7 camp, mostly because I don't have to adjust temps and RH during lights out.

Here's a handy VPD calculator. https://www.globalgarden.co/calculators/advanced-vapor-pressure-deficit-vpd-calculator/

Check out the Mrgrowit podcast with autopotamus. This guy does amazing things with autos!

 

[Markyb]

Yes there's tons of info and opinions out there. White pistols or stigmas are indicating very early pre-flower.

A lot of people will stay at 80 and 60% through out their grow which with a 2 degree leaf offset is 1.17 VPD. I like to keep it near 1.0 during pre-flower and increase to 1.20 in mid-flower. Towards the end I start dropping my temp to 75 and RH to 50% which is around 1.3.

Another thing that has much debate is light schedules with autos. I'm in the 24/7 camp, mostly because I don't have to adjust temps and RH during lights out.

Here's a handy VPD calculator. https://www.globalgarden.co/calculators/advanced-vapor-pressure-deficit-vpd-calculator/

Check out the Mrgrowit podcast with autopotamus. This guy does amazing things with autos!

Thanks! That's a good info! I'm especially glad to hear that even staying at 80F/60% through the whole grow can lead to success. I was afraid the whole plant would fail if I don't follow the required conditions exactly. I think I will try to follow the VPD's you mentioned and have been using.

I'm definitely going to learn more about the VPD and plan my growing conditions ahead when I start my next grow. :)
Though I must say that I am pleased how my first grow has gone so far despite my lack of knowledge and experience. I have not encountered any bigger problems so far, thanks to good communities and helpful growers!