Possible average seeds or something I'm doing wrong?

Hey Guys, long time follower, first time poster. Long story short, im in the southern hemisphere and have been using Msnl seeds for around 15 years. Not every year but have grown 4-6lb outdoor plants like master kush, super skunk, gorilla glue and critical. Al though the last couple few years our seasons seams to be changing. More cloudy wet days in spring then normal and more storms during our dry summer. I don't know if this is causing my issue, my watering or just getting poor quality seeds.
They are all critical female seeds from msnl geminated start of September and put in the ground about 6 weeks later mid October. This is the plants now mid December. I started seeds in a good quality seed raising mix then moved to a 1 gallon fabric pot with an organic garden mix from our garden centre then added perlite 1 bag of mushroom compost and 1 bag of cow manure. Since planting, the plants are still growing but leaves have gone thin and they do not seem to be producing many extra sites or just thriving in general. The weather at the moment is 32 Celsius to 42 Celsius. I'm Watering by 150m hose for about 30mins every 2-3 days. Each watering they would probably receive 40-80L of water, then fertilizing with miracle grow half dose every 7 days depending on weather heat. Keep in mind this watering schedule and fertilizer schedule is they same that yielded 4-6lb's.

What's going on? this is the 3rd season now doing the same. The should be twice as bushy and 5 foot tall by now

They look good to me! I don't know the supplier you mentioned, nor am i familiar with the strain you are growing. However different strains can have some seriously different characteristics. Even different phenotypes amongst a single strain can show drastically different physical qualities.

Are you reusing the same spot? Could be soil compaction by increased rains. Or depleted from previous grows?

Usually a sign of compact medium is stunted plants as the roots can’t branch properly

That does look compacted.
I'd get a couple more bags of manure and composted material, work it in around edge of the root zone, then top dress with some 10-10-10 dry ferts.
Get the roots plenty of oxygen and food, plant will usually sort itself out.

You need to till and mix in more mushroom compost. Soil looks like it might have a lot of clay. The roots are probably struggling, and thats why the plants are growing slow.

Thanks for the responses. Yes they are spots that have been used before, so i better get some more bags and fertiliser.

vinceshep said:

Msnl seeds for around 15 years

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Mostly Dutch Passion in fact, msnl being an empty egg. Your plants aren't showing any disorder, i bet on a bad batch too.

Farmer's Hat said:

You need to till and mix in more mushroom compost. Soil looks like it might have a lot of clay. The roots are probably struggling, and thats why the plants are growing slow.

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Exactly my thoughts!!! Fucking compost and organic matter is what's needed here. Root mass is a direct reflection of plant mass.

GreenGenez421 said:

Exactly my thoughts!!! Fucking compost and organic matter is what's needed here. Root mass is a direct reflection of plant mass.

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yep, my first post here as an old member new account, yet agreed, soil looks not aerated and compact too dense to me.

Clay maybe too, it may damage roots but if possible sticking a stiff long thin metal spike into soil would minimal damage roots id say yet aerate soil

edit- i meant to add, this may be risky and i dont think i can see it anywhere else in this(my) post but possibly gently digging the roots and carefully removing the roots (try not to get light on them or bruise roots) shake away soil and use fluffed up soil good soil fluffy aerated might help your plant greatly if done right.

Personally as a hydro mostly dude myself i might try some half strength hydro nutes but that may not help at all if roots are not getting aeration and are cramped in clay etc and compressed soil like a straight jacket around the roots

HeathStyle said:

Clay maybe too, it may damage roots but if possible sticking a stiff long thin metal spike into soil would minimal damage roots id say yet aerate soil

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Works for aeration or injection, but still there's the clay "in-between" root ball and punched core. Unfortunately for this grow any injection of organic material into the core won't help. It will in a year or 2 that follows, but I'm skeptical.

HeathStyle said:

possibly gently digging the roots and carefully removing the roots (try not to get light on them or bruise roots) shake away soil and use fluffed up soil good soil fluffy aerated might help your plant greatly if done right.

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Incredibly risky but yes, in theory it can work. Not really ideal for in ground plantings. Containers tho, now that would certainly be a more practical and plausible approach. But as a last resort IMHO.
I'd take clones of everything and start over. Still keeping the in-ground going, you never know, they could bounce back with mounding compost and mulching. At least enough to get some harvest.

Bad advice. Don't dig up plants. It won't work out well for you considering you stated your outdoor temps are 32-42°. You will have a floppy plant in a matter of a half an hour. You also stated you water everyday with 40-80ltr of water. I'm gonna go out on a short limb here and say youve got overwatering issues, locking out other nutrients/drowning roots. The plants don't need 40-80ltrs of water ever day that's insane
Also toss out that probe you got there. It's junk.

the runty curly leaf growth does remind me of some problem i had but not sure what it was years ago..Here is a website showing a few causes of those curly runty leaf growth you seem to have.
i will copy paste two impttant parts i found asa jjgrow says overwatering, i agree, 40-80 litres for a plant that small even in high heat is way too much.

anyway here are two copy pastes- over watering and compacted soil problems.
Overwatering

Overwatering is a common issue, especially in less experienced hands. It can lead to root rot, a condition where the plant’s roots are submerged in excess water, depriving them of oxygen. This waterlogging signals the plant to reduce its leaf surface area, resulting in leaves that curl downwards. Overwatered cannabis plants often have a droopy appearance, and their leaves may feel soft and limp.


Another consequence of overwatering is the increased risk of fungal infections and pest infestations. Excessive moisture creates an ideal environment for these problems to thrive, further stressing the plant.

Soil Quality Issues

Poor soil quality can adversely affect the growth of cannabis plants. Soil that is too dense or lacks proper drainage can lead to issues like root rot or nutrient imbalances. Cannabis plants require well-aerated, nutrient-rich soil to thrive.


Compacted or poor-quality soil can restrict root growth, limiting the plant’s ability to uptake water and nutrients, which often results in curled leaves.

from this site..remember if you dont make mistakes you dont learn what to do untill the problem does occur.

anyway heres the site hope it helps..

ps
doesnt look like critical mass strain to me by the way, way too sativa leaning leaves..if that's what you mean by critical seeds.