yellow/brown spots on my leaves not fixing

[O.G.Monk]

Hello everyone

first of all this is my first grow, those are the first plants that i have experience into flowering stage..

i was growing them at the vegetative stage for a long time because they was stunned and small until i find the reason, fix the problems and start the flowering stage light switch..

i always had some nutrient deficiencies no matter if i was adding the correct amount of nutrients, the curent grow was in biobizz all mix soil that its self contains many nutrients for the plants, i always had problem with nitrogen deficiency a little bit more than normal at the vegetative stage, now i am at the 42 day of flowering stage and plants look realy light green on the top with brown and yellow spots on the leaves and they have lost their sweet smell. At the first week of flowering plants was realy beautiful dark green colour and they was smelling like i am cooking sweets inside the room, i got some sweet strains cream caramel and blueberry, now at the final 2 weeks my plants have lose the sweet smell they had, they smell just earthy and i thought that the problem was because of some fungus gnats that i had and their eggs have damage the root system of my plants inside the soil so i bought yellow sticky cards and a bacillus thuringiensis product in a dust form that i found on a local greenhouse nutrients and more shop.. the guy told me to use one tea spoon per 10 liters of water, now each plant drinks about 6 liters of water so i was adding half teaspoon and a little bit more per 6 liters of water with some black strap mollasses on each watering, but the problem got worst more brown spots leaves are almost yellow and i have catch on yellow sticky cards only 4 fungus gnats, maybe i dont have more.. my temps are about 25 celsius and 50% humidity but i dont know if it is the right place where i have the thermometer inside the growroom.. the lower leaves of the plant look healthyer and some buds are big with dark green leaves sticky a lot and amazing smelling but they are under the canopy, i have water until now 3 times with bacillus thuringiensis and i am thinking to flush this thing now..

here is the pictures any advice would help me find out what is going on here.. thank you


The first picture is my plants at first days of flowering stage

 

[O.G.Monk]

 

[maimunji]

Plants have N def from the beginning at week 1. You also underfeed. Can't see what you can do at this point leave them to finish and don't worry you will have good smoke at the end.

 

[O.G.Monk]

yes but the point is to find the reason of all that so the chances for the problem to apear on my next grow will be minimized

 

[maimunji]

Are you using some kind of liquid or powder fertilizer contain N P K or just put them in soil and watering with pure water?

 

[maimunji]

This soil biobizz don't contain enough nutes for veg and bloom you need to add fertilized in soil every third watering more or less depending of how plants looks.

 

[maimunji]

Next grow switch soil and nutes its looks like you use biobizz soil and nutes from what I read in your previous thread. I never use them and can give you my options but if something doesn't work just remove and start fresh. New medium and new brand nutes. You will fight a lot more problem than this N def in your hard road of growing. Which is good thing.

 

[Mystic Funk]

maybe it's just me? but I try and help a lot of growers on here and I see a lot of them using this biobizz with all the same problems. I have never used this medium but i'm starting to think it's junk....

like the other guy said. I would try a new mix next time.
these ones look N deficient. but it's good to have some yellowing in mid to late flowering..

peace
-mystic

 

[Grøn]

Try adding some fish mix to your nutrients at 2ml pr 1L and u dont have those N defs

BioBizz has always been quite light on the feeding so make strong solutions.

Personally i newer been a fan of allmix =)

 

[O.G.Monk]

yes biobizz must be not the best soil and nuts company..

i was thinking my next grow to use canna tera soil and nuts but i see some reviews of realy bad bud taste even if the plant is flushed at the end of the flowering stage with pure water..

so you dont think it is from fugnus gnats all those brown spots on leaves?

 

[mr.brunch]

Before next grow, bleach your grow space and your plant containers... Even if they are new.
Looks like an infection to me- I have had this a few times in the past, and after fkin about with nutes etc with no success the proper deep clean sorted it.

Containers are probably the most important to clean thoroughly.
Hope this helps

 

[mr.brunch]

Also, ime biobizz are crap.

Did a side by side with miracle grow a few years back with identical clones and the miracle grow outperformed biobizz in every area

 

[O.G.Monk]

Also, ime biobizz are crap.

Did a side by side with miracle grow a few years back with identical clones and the miracle grow outperformed biobizz in every area

thanks for the advice..

miracle grow.. i will make a research

is there any way to cure it right now or i just wait until they finish and prepare for the next grow..

i came too far to give up if there is anything i can do to make them better, i am not saying to fix them 100% but when i see those tiny leaves that comes out from buds infected i am afraid that plant is in danger, i dont know if its going to infect the bud too but thats what i am afraid..

thanks again

 

[Grøn]

u can give em some Nitrogen - use any grow component with alot of N and maby u can bump up the yeild abit. When plant yellow up like that late in flower the immunsystem of the plant are weak so they are more prone to pest and other sickness's.

Next time try out using just canna, i would try a salt based and stay away from those intrustrial waste products, that most organic formulations are based on. If you want organic ferts its best to make them yourself =)

 

[O.G.Monk]

u can give em some Nitrogen - use any grow component with alot of N and maby u can bump up the yeild abit. When plant yellow up like that late in flower the immunsystem of the plant are weak so they are more prone to pest and other sickness's.

Next time try out using just canna, i would try a salt based and stay away from those intrustrial waste products, that most organic formulations are based on. If you want organic ferts its best to make them yourself =)

have you ever try canna on your grows?

 

[getbuck]

I believe many growers have problems with biobizz soil/products because of

1) starting feeding the soil too late (I did this)
2) not realizing that the nutes are for dutch tap water which is high magnesium (I did this)

I have seen lots of very good grows from the biobizz series, but fucked up a little on my current grow for the above reasons. If you want to use all-mix soil for your next grow, I would recommend to amend it with dolomite lime etc for the extra cal mag, or give the plants a boost of mag in veg and beginning of flower (I'm using 1 teaspoon of epsom salt in 4 litres of water right now). Apparently its also a good idea to use top-max and bio-heaven. Its not mandatory but seems to boost the yield and fight off deficiencies. I'm doing just grow+bloom and if you check out my thread in this sub-board you will see pictures with similar problems to yours.