Rust spots and slight yellowing, upper canopy. (Day 46. Day 15 of flower)

[ShabbyOrange]

Hi all,

I've given in after trawling through the forum and all the advice i could find online and have come to you all for help,
I really have come to the end of reading and researching, due to becoming lost in all the information and possible causes for my situation and am hoping i could get some confirmation and guidance with this as i'm worried i'll just make things worse without some help.

Spider Farmer SE3000 300w at 100%.
9" to 10" from top of plant.

Hudmidity and temps; 48% to 60% - 21c to 28.9c (69.8F to 84.02F)

Growing in 16l cloth pots (Soil takes up 14-15L, it's not full)
Bio Bizz All Mix soil + Mycorrhizal fungi.

Watering as and when they are feeling light, which is usually 2 to 3 days. (1L to 1.5L if i've gone for a full wet/dry cycle)
Feeding per 1L
Bio Bizz Grow; 1ml
Bio Bizz Bloom; 3ml
Bio Bizz Top-max; 1ml
https://www.biobizz.com/wp-content/uplo ... N-2020.pdf < Following this.

PH levels with 1L water+nutes at 6.4 to 6.9.
Soil test today with 6.4 to 6.8.

Last watering was a 1.5L two days ago, there may have been 0.5ml extra of Bio Bizz Top-max as i lost track. (what i suspect is the cause)

Another thing is when i water there is no run off unless i water with 1.5L, even then i get 5% run off.

I'm considering flushing this and the other plant (other plant shows less exact signs but still the same issues) with 3L and half strength nutes as listed above,
As i feel i have a possible lock out going on.

I really didn't want to post asking for help as there is so much already here that's helpful, i've just gotten so lost after 2 days reading/researching.

Is a flush my best option or am i looking at this all wrong?

[ShabbyOrange]

Id say drop the top max and give an extra 1ml grow per litre till they looking evenly coloured again dude. but im not great with the bio bizz nutes

they look like they seriously hungry from here tho

also what are you using to water the plants with? 1l doesnt sound like much at all for 16l pots. iirc rule of thumb is generally 10% pot size daily if feeding little and often

[ShabbyOrange]

Cal mag,,check the light distance..9-10 seems close

[ShabbyOrange]

Id say drop the top max and give an extra 1ml grow per litre till they looking evenly coloured again dude. but im not great with the bio bizz nutes

they look like they seriously hungry from here tho

also what are you using to water the plants with? 1l doesnt sound like much at all for 16l pots. iirc rule of thumb is generally 10% pot size daily if feeding little and often

Been fairly hesitant with over doing it with the nutes whilst following that guide, they had suggested only 1ml all the way through.
What signs have you saying it's hungry, is it the upper yellowing? I've honestly been under the impression it's been fed well up until the last two days.

1L measuring jug with tap water, often put 500ml into a cleaned bottle with holes in the lid, so i can angle the water to get around the edges and water evenly.
Then pour in the remaining 500ml.
It's not filled all the way up with soil (miscalculated when bought the all-mix), so when i do my method i get run off and the sides of the cloth pot are damp/wet.

Really thought i was feeding it enough.

[ShabbyOrange]

Cal mag,,check the light distance..9-10 seems close

Sadly i don't have the option to purchase any until a week from now.
I've measured the Lux and Umol and all that jazz, the temps as well with a gun, had to experiment a fair bit whilst following the spider farmers recommendations, the other 3 have d one fine at this height, so far.

https://spiderfarmer.co.uk/wp-content/u ... 36x950.jpg

I'm not too sure what Mid and Late flower would honestly look like, i assumed i was at the start of Mid.
I'll raise to 12" i guess.

[ShabbyOrange]

yes mate, the colour looks fairly light all over the plant so might just be a hungrier girl than the others

[ShabbyOrange]

yes mate, the colour looks fairly light all over the plant so might just be a hungrier girl than the others

Yeah fair, it has been the one out of three that has the least ammount of soil but is by far the tallest.
It's late, so i'll do a water tomorrow for it, i'll throw in an extra 0.5ml grow and no top-max for tomorrow morning.

Hopefully see more colour come through by mid-day or evening. Thanks GMO.

[ShabbyOrange]

Hi All,
Bit of an update on the plants with the rust spots. So far all good, nothing continued aside from some slight yellow but i've gotten on top of that.

I've run into an issue though... Whilst this Gelato Auto is picking up with it's pistils and buds, i have another Strawberry Gelato that's over taken everything.

I estimate i may have 2-3 more weeks for the Gelato auto (Pictured above).
But less than 2 weeks before the S.Gelato is ready to be cut. (pictured below)

Thoughts and opinions, as i'd want to cut and hang to dry all of them at the same time, how feasable am i to be able to do this?

[Petal]

yeah, I"d say late flower and nutes a tad high so it shows up as rust spots.
the leaves don't have the same capacity as before as they losing their chloryphylll etc and are at the stage of dying off.

[Petal]

oh I see i'm late to the party lol
disregard :)