Flower after Summer Solstice

Getting ready for my first outdoor grow. I have completed about ten indoor grows but am a total noob at outdoors and will be soliciting information from time to time. So, my question is how long after the Summer Solstice do you typically start to see flower? Trying to get a handle on this so I can approximate harvest times. IDEALLY, I would like to plant four different varieties that finish in succession. I am looking at seeds that finish at 9, 10, 11 and 12 weeks.
So... if Summer Solstice is June 20, 2021, can I anticipate emergence of flower about 3-4 weeks after that (like things behave indoors when you make the flip) and then add 9,10,11 and 12 weeks to that, respectively? Or is this not at all how it works? If this is not how it works, is there a way to organize a grow with a successive harvest?
Thank you in advance for your kind and constructive responses.

Pacific Northwest growing here. My current lady started to show her first flowers on Aug 28 Highwinds and severe smoke made it necessary to bring her inside and hang a light over her. Before that I had planned on her being under her hoop house till at least the end of October. Now it depends on how she responds her environment. Picture is from today after a major haircut.

So, it was about nine weeks after solstice before they were showing flower? That really makes it even more difficult to predict finishing time. Are there any tools that would be helpful to make this prediction?

If you have the space you build a hoophouse and then do a light dep cover over the top so that you can start flowering early. Only way to know when things are ready for harvest is watching the trichs.

Flowering started when we were at 13.5 hours of light a day.

That is a fair answer. Thank you!

How about this... I live in SW Missouri (zone 6). When you buy seeds, each variety comes with a flowering time measured in weeks. Given that I live in SW MO, what is the longest (in weeks) flowering seeds I should buy? 10? 11? 12 weeks?

I appreciate the help. Just trying to make my due diligence in preparation for a good 2021 grow.

MountainMedic1206 said:

That is a fair answer. Thank you!

How about this... I live in SW Missouri (zone 6). When you buy seeds, each variety comes with a flowering time measured in weeks. Given that I live in SW MO, what is the longest (in weeks) flowering seeds I should buy? 10? 11? 12 weeks?

I appreciate the help. Just trying to make my due diligence in preparation for a good 2021 grow.

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You sound like you are doing more than I've done in choosing what seeds you are gonna grow. I'm growing from seeds which a buddy gifted me. Somebody's gotta chime in with more help I'm sure. Good luck!

Northern California 2 of my plants began flowering on August 1st.

3rd began August 7th

MountainMedic1206 said:

That is a fair answer. Thank you!

How about this... I live in SW Missouri (zone 6). When you buy seeds, each variety comes with a flowering time measured in weeks. Given that I live in SW MO, what is the longest (in weeks) flowering seeds I should buy? 10? 11? 12 weeks?

I appreciate the help. Just trying to make my due diligence in preparation for a good 2021 grow.

Click to expand...

I wouldn't go off of timlines. Imo you should be looking for specific strains that fit your palette as well as environmental factors for growing.

Different strains are resistant to different things. Some are heat resistant, some are mold resistant and so on.

For an outdoor grow its best to know your environment then find the strains that fit that spectrum

I hope this helps.

Yes sir, I am trying to do exactly that. I know that, in my area, humidity in the late summer and early fall can be significant resulting in mold. Thus, I am looking for mold resistant strains. My concern over flowering is also due to fear of mold. I would like to flower long enough to grow some of the later finishing sativas but I am also aware that going too long risks early freezes and botrytis.

MountainMedic1206 said:

Yes sir, I am trying to do exactly that. I know that, in my area, humidity in the late summer and early fall can be significant resulting in mold. Thus, I am looking for mold resistant strains. My concern over flowering is also due to fear of mold. I would like to flower long enough to grow some of the later finishing sativas but I am also aware that going too long risks early freezes and botrytis.

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every year, i select my best, strongest clones and grow them under 22on/2off cycle indoors, then when late april/early june arrives I stick them outside (in the western midwest) in about 14.5 hours of sunlight...they almost always start flowering then, and finish up around late august, early september, so I miss the cold-air rains of October and finish my buds under dry, hot air and massive sunshine. Its all timing and planning, good job on being proactive for 2021!

Agronut said:

every year, i select my best, strongest clones and grow them under 22on/2off cycle indoors, then when late april/early june arrives I stick them outside (in the western midwest) in about 14.5 hours of sunlight...they almost always start flowering then, and finish up around late august, early september, so I miss the cold-air rains of October and finish my buds under dry, hot air and massive sunshine. Its all timing and planning, good job on being proactive for 2021!

Click to expand...

I like this advice very much. I think I will do exactly this. Thank you!