Plant stopped growing 10 days ago - New grower, First plant

[OldTimerJustStarting]

Hello all, first post, and new your suggestions and guidance as I have no clue what I am doing yet.

I planted an Autoflower seed on April 6, sprouted on April 10, and should be in the 3 week of flowering. I must have done something wrong. Some of the plant's leaves went yellow about 10 days ago, not many but some and most were only partially yellow. So, I defoliated about 5 days ago and now, I haven't seen any growth. So, have I completely messed this plant up and need to start over? Is there something I can do to help the plant? Any an all guidance would be appreciated.

I attempted to share photos, first time, hope they come through ..

[Bluey]

Hi and welcome

We need to know a few things to help.

What size pot and what medium are you growing in?

What are you feeding her? Do you measure pH?

That bud in the first pic looks pretty good

[Gingerbeard]

You're good. Looks pretty spot-on for timing and maturity.
Plants stop growing. The leaf discoloration is because you are in mid-late stage flowering. Your plant wants more energy for flowers and less for leaves. Soon, your hairs will start turning color. Go to the main GWE website. Do a search for 'harvest.' It'll give you a good idea what to start looking for.
A good rule of beginner thumb is to get yourself a loupe. At least a magnifying glass. When you are unsure about something happening to leaves, give them a glassing. If you don't see anything that shouldn't be there, it is probably a nutrient issue. The loupe will also help checking trichomes for harvest.
How about a canopy shot?

[Bluey]

I think you may have a phosphorus lockout from too low pH.

Orange leaves are not normal fade Mr. Beardy

[Gingerbeard]

An otherwise healthy plant. If the lockout is the thing, it is fairly recent. Early-mid stage flowering recent.

[OldTimerJustStarting]

Hello,
The pot is a Lowes pot In house, Beleaf and Fisherman and the specifications state it is a 1.75 Gal Grower Pot. I sowed directly to soil. The soil is a manure compost, Peat Moss, Vermiculite and perlite. I also used Mycorrhizal fungi in the spot where I planted the seed. I also am following the feeding schedule from Lotus Nutrients along with their nutrients.

I do measure the PH but at times I have difficulty obtaining the exact pH for the total gallon. I mix a gallon at a time.

The seed is from Sensi and is a Skunk #1.

The plant is indoor in a Vivosun tent with a humidifier, dehumidifier, LED lights, multiple fans controlled by the Vivosun grow controller. I have not connected the drip as of yet, not sure I will.

Hope this helps...

Regards

[OldTimerJustStarting]

This is a canopy shot. the plant on the left is the one with the issue. The one on the right is a week younger.

[OldTimerJustStarting]

So to deal with phosphorus lockout flush with plain water with the proper pH. Not sure how long but will plan on at least two weeks. Still reading more about the topic.

Thanks

[Bluey]

The plant on the left has nutrient burn. So you need to reduce the amount you are giving that one. It's indicated by the tips of the leaf curling up and browning off. The one on the right may have it but just minor from what I can see.

I would give it a gentle flush then give reduced flower nutes with correctly pH'ed water for that medium, which I am not familiar with.

[OldTimerJustStarting]

Thank you,

Working on the flush water now .. 6 - 6.5 pH...

Thanks for your time from all ... most appreciated

[Bluey]

If you are growing in soil your pH needs to be higher around 6.8. You may need to measure it more accurately and if you buy a pH meter get a good one not a cheap one. An Apera PH60 off of their Amazon shop with calibration fluid and storage solution is the go.

[Rootsruler]

I don't like flushing plants. What I would do is to mix a 1/4 to 1/8 solution of what you have been feeding them. Feed as normal.

[Bluey]

Nor do I but...

[Rwise]

With the peat-moss your soil will be acidic unless you also added a buffer, or had high PH to start with.

[OldTimerJustStarting]

Thanks Bluey, Rootsruler, and Rwise ... And don't mean to leave Gingerbeard out, thanks to all ... It is appreciated ... Now I'm concerned as I started flushing (6.5 pH water) ...today is the 2nd day of this water ... Geez, I know I'm going to screw this up .... Rwise, I don't think I added any 'buffer' as you mentioned and I'm not sure I know what that is ... I will wait until tomorrow afternoon to determine my next step...

The pH meter I have is a Vivosun but I will spring for the Apera PH60 ... and retrain myself ... My process today is I use distilled water (which should be about 7.0 but I find it always higher) ... pour some out in a bowl, add DOWN or UP depending on the reading, then add that back to the gallon of water, take another sample, adjust from the next reading until I reach the 6.5 value... Is there a different method I should follow? Mind you, I'm not a chemist, just some old dude learning how ... Thanks again

[Bluey]

Well your growing in soil right. You have a low pH issue by the looks of it but your flushing at 6 5? Shouldn't you bring the pH up a little more? Do you know what the ideal range is for inputs into soil? I can't remember.

[Rwise]

Dolomite lime would be a good PH+ buffer, can be top dressed and watered in. Distilled water cannot be tested unless something is added to it such as Epsom Salts, it also it goes acidic setting, 1 tablespoon per gallon of water is good. In flower one wants to raise the PH to 6.5-6.8 for best results in soil (6.2-6.5 in veg)

[OldTimerJustStarting]

Bluey, everything I've read indicated between 6 and 6.5. I assume this number is correct. You message states I have a LOW pH issue. I am not sure as I don't know enough ... reading an article about phosphorus lockout it indicated the condition was due to HIGH pH. Looking for that article again... maybe I miss read it... Am I in phosphorus lockout ?

Thanks for the assist

[Bluey]

Orange leaves indicates something like that. P or K, I can't remember.

Read up on this website. It's all there for you. I linked to a soil grow article that may help you.

[OldTimerJustStarting]

Bluey,

This is the site I was reading...Removed the link due to their advertising within the link - sorry (is it okay to include this link? I do not want to get in trouble with anyone)

[Bluey]

https://www.growweedeasy.com/soil

[OldTimerJustStarting]

Seems like Coco Coir is the growing media people are using now ... what do you use?