New Grower The life cycle of auto flowering cannabis.

Another common question I see is when to switch autos from veg to bloom. Many people are under the impression that as soon as they see the first flowers it's time to switch. Perhaps a little explanation of the life cycle of autos will help to clarify this.

Weeks 1 - 3. Once you've started your seeds and they break the surface of the soil, they are in their seedling stage. The first set of leaves to appear will usually single fingered, followed by a second set that may still be single fingered or perhaps 3 fingered. Once that second set appears growth will start to accelerate as the new leaves provide more photosynthesis. This process will continue, more new leaves, faster growth. Depending on the type of soil in use, mild vegetative nutes can be introduced at week 2. By week 3 most plants will start to show their sex. Males will start to produce pollen sacks and females will display pistols.

Weeks 4 - 6. The plants are now entering a pre flowering stage. During this time the plants should exhibit explosive growth, often as much as a new set of nodes and 1" vertical growth a day. This is the time when they will gain most of their vertical height. Many people make the mistake of switching from vegetative to flowering nutrients at this point, assuming that since they see flowers it must be the proper time. This is incorrect. If the switch to flowering nutes is made at this time the vertical growth will stop and the plant will put it's energy into producing buds. If you need to keep your plants small, or want them to finish earlier, they by all means switch nutes at this point. But if you want to get the most out of your plants continue feeding vegetative nutes until you see the vertical growth slow and stop. Depending on the strain that will usually be sometime during week 5 or 6.

Weeks 7 - 9. By now vertical growth has stopped and the switch to flowering nutrients has been made. The buds will start to fill out and put on weight, becoming hard and tight. Pistols will start to change from white to brown, orange, red, etc. By now the plants will also have developed a strong smell. Toward the end of this phase the large primary and smaller secondary fan leaves will begin to turn yellow. This is an indication that the plant is moving toward the end of it's life.

Weeks 10 - 11. At this time flowering nutes should be discontinued and only plain pHed water fed to flush the remaining nutrients from the soil and improve the taste. Yellowing of the fan leaves will continue as the plant draws the stored energy from them. Eventually they will die and fall off. By the time that the smaller leaves that come from out of the buds will also start to turn yellow. Then it's time to harvest.

I know that many of you are thinking that the seed bank said the plants will finish in 8-9 weeks, so why are you saying they take 10-11? The claims made by the seed banks are somewhat deceptive. If you switch to flowering nutes at week 3 or 4 the plants can finish in the times the seed banks say but they will remain small and not reach their full potential yield. Years of growing by myself and others has shown that autos do best if you follow this time line.

Of course, there will always be variations depending on the strain, the environment, nutrients, etc. This information is meant to only serve as a general guideline.

For more detailed information on when to harvest your plants, please see: https://www.autoflower.org/f44/when-harvest-autos-your-leaves-will-tell-you-4889.html.

NOTE: This is an informational thread. Do not post specific questions about your grow here. Please start a new thread in the appropriate forum.
 
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Hi. I was hoping I could please get a question answered on this topic.

Is it possible for the primary fan leaves to start yellowing before the pistols all turn from white to orange?

I'm currently right at about day 60, and I think I may have other issues, but I wanted to rule out the possibility that she's done. Thanks!
 
She's not done good sir. Not at 60 days. As well, pistil coloration isn't as relevant in harvest time as other factors are. White pistils change to a reddish brown during drying.

I believe you may have other issues too. PM me your thread link or start a thread up and PM the link. I'd be glad to stop in and help out, I'm pretty sure I've seen some of your issues and commented already though.
 
Sorry, but you're getting into specifics about your grow, which is off topic for this thread. I suggest you open a thread in the New Growers forum for these questions. I need to keep this thread on point.

i obviously want to get the best yield and result that i can get,so what should i do?

how long should i grow them indoor,before putting them outside..cfl grow light or mh?
are 11 litres pots big enough to reach maximum potential.
will i use some sort of organic root stimulator at the start..
should i get plastic sheeting to cover plants,to prevent bud rot and to stop the rain leaching all the nutrients from the soil?

thanks very much..
 
when to switch nut

I was wondering when I should switch but my sweet cheese auto is 5week 1 day old.
 

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Excellent thread!!!

very easy to understand instruction on the life cycle of an auto:slap:
 
Hi Muddy, many thanks for a very interesting read. I am about to start my second DWC grow and i think Iwill adjust me feeding schedules as per your information. Can I just confirm. You would not give ANY bloom nutrients until the end of the plants vertical growth phase. I only ask as it seems to go against most nutrient manufacturers instructions that I have used and read. (not that I trust them)

Many thanks in advance for your advice..

https://www.autoflower.org/f44/think-different-17683-6.html
 
Bear in mind that those nutrient schedules published by the nute manufacturers are designed for photo plants, not autos. There may be some benefit to a transition feed around the time vertical growth starts to slow, half veg, half bloom. Some extra N to help finish vertical growth and some P and K to kick the buds off.

Hi Muddy, many thanks for a very interesting read. I am about to start my second DWC grow and i think Iwill adjust me feeding schedules as per your information. Can I just confirm. You would not give ANY bloom nutrients until the end of the plants vertical growth phase. I only ask as it seems to go against most nutrient manufacturers instructions that I have used and read. (not that I trust them)

Many thanks in advance for your advice..

https://www.autoflower.org/f44/think-different-17683-6.html
 
Thank you very much for all the solid experience based information that you provide muddy!!! Maybe I should start my thread over here on afn too! I think I may.. A little late at day 28 but... Thank you again!!!!
 
You're very welcome. If you're growing autos, this is the place to be.

Thank you very much for all the solid experience based information that you provide muddy!!! Maybe I should start my thread over here on afn too! I think I may.. A little late at day 28 but... Thank you again!!!!
 

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