Can't identify the problem of my baby. PLS help me.

I can see some strange discoloration started on the new leaves with yellow tips. few of the leaves have brown spots. I tried all of the approaches to identify the problem but lack of experience lead me to nowhere. what do you think? excess or deficiency of some elements? i prepared several liters of ph-d water to flush her but afraid from causing bigger problems. should i flush or she needs something else?
the growth is slowed down, also the buds are lazy to grow. all of the new leaves are "thin blades".
baby is in a soil (plagron royal mix) in textile pot 19l, tapped water is always ph-ed to 6.5, i used plagron bloom and plagron sugar royal half of the recommended dose by producer. can't report tds because i didn't buy the meter. light is mars hydro ts600 (100w) cca 35 cm over the canopy.

You should describe the grow environment to get the best answer to your problem.
Lights
medium
PPM feed, etc

Capn-Crunch said:

You should describe the grow environment to get the best answer to your problem.
Lights
medium
PPM feed, etc

Click to expand...

baby is in a soil (plagron royal mix) in textile pot 19l, tapped water is always ph-ed to 6.5, i used plagron bloom and plagron sugar royal half of the recommended dose by producer. can't report tds because i didn't buy the meter. Light is mars hydro ts600 (100w) 35 cm over the canopy.

Capn-Crunch said:

You should describe the grow environment to get the best answer to your problem.
Lights
medium
PPM feed, etc

Click to expand...

btw, I'm flushing right now.

cut these two leaves.

I think they look fine. I don't know those nutrients, but half dose sounds right. They look very healthy. Good job

TessaMaria said:

I think they look fine. I don't know those nutrients, but half dose sounds right. They look very healthy. Good job

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thanks for your reply but I'm afraid of nute burn caused by accumulated nutrients in the soil. i flushed her with 4 liters of water. maybe it will help. my real concerns is that the grow slow down. She is 42 days old from germination.

Burnt tips happen.
Just watch the nutes.
Flushing the soil is fine but honestly the plants look OK.
Your light is your major issue.
Only gonna get so much density from 100W.
Upgrade the light for better results.

drsaltzman said:

Burnt tips happen.
Just watch the nutes.
Flushing the soil is fine but honestly the plants look OK.
Your light is your major issue.
Only gonna get so much density from 100W.
Upgrade the light for better results.

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yeah, the next session something stronger will be applied. i also have a uvb 310 light tube from migro. (but it is just for the resin and taste) i thought the ts600 will be enough for microgrowing but in the end i bought bigger pot and more robust strain seed.

Maybe be early sign of K deficiency. Get other opinions

papricash said:

baby is in a soil (plagron royal mix) in textile pot 19l, tapped water is always ph-ed to 6.5, i used plagron bloom and plagron sugar royal half of the recommended dose by producer. can't report tds because i didn't buy the meter. Light is mars hydro ts600 (100w) 35 cm over the canopy.

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With this mix (organic) you are suppose to use Alga bloom with green sensation. Bloom is base and GS is micro together with PK boost. You can use power roots as your micro but than you will be short on P and K. Did not used sugar royal so can not say what is made for...

Bukvičák said:

With this mix (organic) you are suppose to use Alga bloom with green sensation. Bloom is base and GS is micro together with PK boost. You can use power roots as your micro but than you will be short on P and K. Did not used sugar royal so can not say what is made for...

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thanks mate. yeah, I'm gonna buy sensation tomorrow i hope it will be the last nute because nute set is growing like a fxxking snowball. sugar royal should be: "Sugar Royal is used in plant cultivation for enhancing the natural flavour and taste of the final product. It is an addition to use alongside the basic nutrient. The natural processes of the plant during the flowering period will be supported and challenged by using Sugar Royal."
It is 9-0-0 npk and i found an advice to use is with sensation together. of course, without ec meter every feeding cause me anxieties. takže odporúčaš kombinovať alga bloom so sensationom? ten sugar nemám pridávať? vždy dávam len 50% odporúčanej hodnoty, keďže som sadil do fertilized (6 týždňov) pôdy. bojím sa ze si rastlinku zničím. nabudúce už bez ec merača nezačnem.

Looks like you have mites for starters. Whats your air flow like in there, any intake? Bout time to start adding on the bloom and camg but it's easy to burn them up when they can't breath.

etruthfx said:

Looks like you have mites for starters. Whats your air flow like in there, any intake? Bout time to start adding on the bloom and camg but it's easy to burn them up when they can't breath.

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mites? i can't see mites anywhere on the plant. my tent is in a bathroom, passive air intake from the bottom of the tent. two circulation fans 24/7 and exhaust fan with filter 24/7. exhaust tube is in the window which is opened and the intake is secured from there. last 3 weeks i experimented with co2 supplementing and the window was half closed with exhaust tube left in the room to secure co2 circulation in the bathroom. for blooming i use plagron alga bloom, plagron sugar royal and from tomorrow plagron green sensation. i know mites from a different plants in the garden and they are really small and visible. No mites yet but I will check the plant with magnifier.

papricash said:

mites? i can't see mites anywhere on the plant. my tent is in a bathroom, passive air intake from the bottom of the tent. two circulation fans 24/7 and exhaust fan with filter 24/7. exhaust tube is in the window which is opened and the intake is secured from there. last 3 weeks i experimented with co2 supplementing and the window was half closed with exhaust tube left in the room to secure co2 circulation in the bathroom. for blooming i use plagron alga bloom, plagron sugar royal and from tomorrow plagron green sensation. i know mites from a different plants in the garden and they are really small and visible. No mites yet but I will check the plant with magnifier.

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Might be wrong. Hard to tell from the image. I'm referring to the white specs in the middle that looks like mite damage

etruthfx said:

View attachment 4856556

Might be wrong. Hard to tell from the image. I'm referring to the white specs in the middle that looks like mite damage

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thanks bro for your advice. i will check it later. but i just read that some mites types are almost invisible. so, my question is, i have a insecticide killer in a spray should i apply like a prevention? i have still 4 weeks till harvest but im afraid of bad taste or killing the plant from the insecticide. (the spray is for indoor plants but not a special one for weed)

i didn't mention i started to use uvb light 2 days ago. can it help against hypothetical mites?

Want to be careful what you use in bloom like you said it can give a bad taste that's why it's especially important to have them treated in veg so even if you do get a problem it won't completely destroy them before harvest, Once they get in the buds it's hard because you don't want to damage the pistils or flower. Plant therapy is good in bloom, or 1-2 tbs per gallon of 70% iso alchohol will help. But its mostly a veg remedie. If you have 2-4 weeks left I wouldn't even worry about it, take care to preserve them in the home stretch

I checked the plant and made probably the last defoliation. I didn't find any signs of mites. I guess yellowish new leaves, tip burns and brown spots just in the new ones are caused by some nute issue. i dunno if it is deficiency or overfeeding. i attached some pictures and if you have any idea or recommendations feel free to write me. i will really appreciate it.