CANNABIS SEEDLING WITH PURPLE GROWTH/BURNT TIPS

Massgrower98 · Mar 13, 2020

Hi everyone new grower here and new to the forums... I am a dedicated grower who is always trying to figure out the problems with my plants when I have one. I could really use some help identifying what is wrong with my seedlings ... they've got purple growth and burnt tips let me explain what I'm doing in the garden...
• Im using roots organic soil right out of the bag (have not amended the soil or feed with anything yet other than the nutes that are in the soil)
• I'm ph'ing my water at 5.8 to 6.2 because I was told that 6.5 is to high for seedlings and they'll uptake all the available nutrients but I'm not sure if it's working yet because the purple growth seems to still be coming ...
• I'm using filtered water
• Temps in grow room 77 - 80 in daytime , 74 - 70 at night. Water temp is 68 - 70 degrees.
• Using T5 fluorescents
I just dont understand why there burning and showing purple growth is just pisses me off because I strive for perfection.
So if any EXPERIENCED growers could give me any ideas I'd appreciate it a lot just have a lot on the line with my outdoor garden and these seedlings so I want to ensure I'm doing everything right and could just use some extra advice so PLEASE SOMONE LET ME KNOW WHAT YOU THINKS WRONG ANY ADVICE IS APPRECIATED THANK YOU.

Hidd3nGr0w · Mar 13, 2020

No expert here either, but two things stand out. First you really do not need to ph the water that low and if you do 6.5-7.0 is more what you would want. Mine usually runs about 6.5-6.8. Second, your perlite is stained which is usually an indicator of over watering, from my experience with roots organics thats what color they turn right before green, which means over watering.

Massgrower98 · Mar 13, 2020

Ok thanks for the info man, yeah I had a feelings I've been over watering... I've been just watering every day alittle around the

Hidd3nGr0w said:
No expert here either, but two things stand out. First you really do not need to ph the water that low and if you do 6.5-7.0 is more what you would want. Mine usually runs about 6.5-6.8. Second, your perlite is stained which is usually an indicator of over watering, from my experience with roots organics thats what color they turn right before green, which means over watering.

Ok thanks for the info, yeah I'm just kind of confused on who to believe I've been told that you want the ph of your water to be between 6.0 and 6.2 for the first week or two because it'll help them not uptake all the available nutrients hence no burn... and yeah I believe I prob am over watering alittle bit , I keep feeling the top soil and I realize its dry then proceed to water when dry but its prob still most a couple inches down just gotta be smarter with watering i guess... I've been watering once everyday just alittle around the plant the root zone is still small so I'm not flooding the whole pot by any means ... but either way it's good to get other people's opinion really just trying to get to the bottom and have a healthy crop!

Massgrower98 · Mar 13, 2020

Hidd3nGr0w said:
No expert here either, but two things stand out. First you really do not need to ph the water that low and if you do 6.5-7.0 is more what you would want. Mine usually runs about 6.5-6.8. Second, your perlite is stained which is usually an indicator of over watering, from my experience with roots organics thats what color they turn right before green, which means over watering.

Lol now I dont know who to believe the guy that told me to ph water from 5.8 to 6.2 or ph the water from 6.2 to 6.5 lol fuck

MIMedGrower · Mar 13, 2020

6.5 ph is ideal for your potting soil but it is already buffered to be there. Thats what the lime is for.

But normal tap water is not going to affect it. Adding too much acid (ph down) will eventually acidify the soil though.

Ph adjusting is for hydro. You arent affecting the plants uptake with it in soil.

Your medium and seedlings look overwatered like @Hidd3nGr0w said.

Massgrower98 · Mar 13, 2020

MIMedGrower said:
6.5 ph is ideal for your potting soil but it is already buffered to be there. Thats what the lime is for.

But normal tap water is not going to affect it. Adding too much acid (ph down) will eventually acidify the soil though.

Ph adjusting is for hydro. You arent affecting the plants uptake with it in soil.

Your medium and seedlings look overwatered like @Hidd3nGr0w said.

so your saying I dont have to use the ph up & down to get a perfect ph? Because that's pretty much what I've been doing I add multiple drops of ph up and ph down til it's where I want it to be around 6.0 to 6.2 ... ph'ing water is only for hydro?

Massgrower98 · Mar 13, 2020

MIMedGrower said:
6.5 ph is ideal for your potting soil but it is already buffered to be there. Thats what the lime is for.

But normal tap water is not going to affect it. Adding too much acid (ph down) will eventually acidify the soil though.

Ph adjusting is for hydro. You arent affecting the plants uptake with it in soil.

Your medium and seedlings look overwatered like @Hidd3nGr0w said.

That's what my ph is showing right out of the tap so your saying I shouldn't add acouple drops of ph down to get it to 6.5?

Massgrower98 · Mar 13, 2020

MIMedGrower said:
6.5 ph is ideal for your potting soil but it is already buffered to be there. Thats what the lime is for.

But normal tap water is not going to affect it. Adding too much acid (ph down) will eventually acidify the soil though.

Ph adjusting is for hydro. You arent affecting the plants uptake with it in soil.

Your medium and seedlings look overwatered like @Hidd3nGr0w said.

Sorry to bug you, but your saying when growing in soil you dont have to use the liquid ph up & ph down ? If the lime in the soil keeps the ph at 6.5 I'm all set?

MIMedGrower · Mar 13, 2020

Massgrower98 said:
Sorry to bug you, but your saying when growing in soil you dont have to use the liquid ph up & ph down ? If the lime in the soil keeps the ph at 6.5 I'm all set?

Well the peat in the mix is like 4.0 ph and the lime (calcium) raises it up to 6.5 or where the soil is set. Its a balance.

Adjusting ph depends on the alkalinity of your source water not the ph. Ideal water ec is .3 or 150 ppms. If your water is close to that you likely dont need to adjust ph in buffered potting soil.

Do you know whats in your water? Dont know why its not mentioned on forums much but it is the most important detail when starting up.

For example. My well water is 8.0 ph out of the tap. But only has 150 ppm mineral content. I never adjust it and my runoff comes out 6.5 ph in ocean forest and a little lower in pro mix hp. 6.3.

Also if you do have hard water (high allalinity) and need to adjust. Never use both up and down at the same time. Its better to mix the tap with ro water down to 150 ppm anyway.

the rrock · Mar 13, 2020

Ive grown in all mediums and only needed to adjust PH in hydro.In 40 years of continuous growing ive never added PH up or down to any soil. I always let soil dry out also overwatering can lead to numerous problems,

Massgrower98 · Mar 13, 2020

MIMedGrower said:
Well the peat in the mix is like 4.0 ph and the lime (calcium) raises it up to 6.5 or where the soil is set. Its a balance.

Adjusting ph depends on the alkalinity of your source water not the ph. Ideal water ec is .3 or 150 ppms. If your water is close to that you likely dont need to adjust ph in buffered potting soil.

Do you know whats in your water? Dont know why its not mentioned on forums much but it is the most important detail when starting up.

For example. My well water is 8.0 ph out of the tap. But only has 150 ppm mineral content. I never adjust it and my runoff comes out 6.5 ph in ocean forest and a little lower in pro mix hp. 6.3.

Also if you do have hard water (high allalinity) and need to adjust. Never use both up and down at the same time. Its better to mix the tap with ro water down to 150 ppm anyway.

Yeah my well water out of the tap is 6.8 to 7.0 ph and 170 ppm... and I dont use RO at all but I'm thinking of investing into a RO system, is it worth it?

MIMedGrower · Mar 13, 2020

Massgrower98 said:
Yeah my well water out of the tap is 6.8 to 7.0 ph and 170 ppm... and I dont use RO at all but I'm thinking of investing into a RO system, is it worth it?

No. Your water is in good range. I would try it unadjusted for sure. And let the soil dry out good so the pot feels almost alarmingly light before watering.

I only use my ro machine for the humidifier to keep the wick filter clean longer. I went through this learning curve too but actually spent an uneeded $200 on an ro unit.

Also those little sonic humidifiers spew Calcium dust with tap water. Learned that one the hard way too.

Massgrower98 · Mar 13, 2020

MIMedGrower said:
No. Your water is in good range. I would try it unadjusted for sure. And let the soil dry out good so the pot feels almost alarmingly light before watering.

I only use my ro machine for the humidifier to keep the wick filter clean longer. I went through this learning curve too but actually spent an uneeded $200 on an ro unit.

Also those little sonic humidifiers spew Calcium dust with tap water. Learned that one the hard way too.

X I use a humidifier that spits out mist and it's a ultrasonic so you say I shouldn't be using it?

Formallyhap · Mar 13, 2020

I grow in 20 percent humidity and other than drying out bud too fast I never worry about raising it.

MIMedGrower · Mar 13, 2020

Massgrower98 said:
X I use a humidifier that spits out mist and it's a ultrasonic so you say I shouldn't be using it?

Is there white dust building up around fans and intakes?

If so. Tap water in the sonic is the cause. It sprays a fine dust you dont see until it builds up. I had to vacuum out my filter and clean out everything. Many reports of this online.

MIMedGrower · Mar 13, 2020

Formallyhap said:
I grow in 20 percent humidity and other than drying out bud too fast I never worry about raising it.

20 is low but even with all the vpd hype the truth is cannabis adapts to low humidity very well.

I just keep the whole house at 45 to 60% year round and intake from inside.

I need a humidifier in winter. Healthier for us and the plants. And i live near a lake with an ipen basement so i run a 70 pint dehumidifier or two year round down there to keep mold at bay.

Massgrower98 · Mar 13, 2020

Formallyhap said:
I grow in 20 percent humidity and other than drying out bud too fast I never worry about raising it.

Yeah I agree as long as

MIMedGrower said:
Is there white dust building up around fans and intakes?

If so. Tap water in the sonic is the cause. It sprays a fine dust you dont see until it builds up. I had to vacuum out my filter and clean out everything. Many reports of this online.

Now that you say that when I focus my camera really still I see these little white dots all over my seedlings and I was wondering wtf it was because I never saw that before... looks like trichomes lol

MIMedGrower · Mar 13, 2020

Massgrower98 said:
Yeah I agree as long as

Now that you say that when I focus my camera really still I see these little white dots all over my seedlings and I was wondering wtf it was because I never saw that before... looks like trichomes lol

Well if it rubs off it could be calcium dust.

CANNABIS SEEDLING WITH PURPLE GROWTH/BURNT TIPS

Massgrower98

Hidd3nGr0w

Massgrower98

Massgrower98

MIMedGrower

Massgrower98

Massgrower98

Massgrower98

MIMedGrower

the rrock

Massgrower98

MIMedGrower

Massgrower98

Formallyhap

MIMedGrower

MIMedGrower

Massgrower98

MIMedGrower

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