Need some advice

[Cobain420]

Very good. I’m at a loss then. What’s your watering / lighting regimen?

anyhow, I’m after having a wonky seedling turn out great

They were on a 16/8 shedule inside until week 2 now they are outside and get around 12 hours of direct sun and 3 hours indirect.

For watering I give nute then rotate to water then back to nute

 

[Cobain420]

Ok si far 1 and 4 seem to be doing quite well

2 and particularly 3 seem to have brow spot on the first set of leads

 

[tronN00dles]

Right o

Ok si far 1 and 4 seem to be doing quite well

2 and particularly 3 seem to have brow spot on the first set of leads

Are you using cal-mag?

 

[Cobain420]

Right o


Are you using cal-mag?

No I bought some but saw on the GH micro that there already cal mag in it .

 

[tronN00dles]

No I bought some but saw on the GH micro that there already cal mag in it .

There is, although probably not enough if you’re using distilled water. That being said, there’s dolomite lime in the Pro-Mix, but according to the manufacturer you’d still want to supplement calcium after the first 10 days or so. If you’re using calcium free water, I believe what’s in the micro is only going to provide ~20ppm of calcium or so which won’t be enough.

 

[draxcel]

From my phone It seems your leaves are a bit slightly yellowish or It Is my impression?
Only on the tip zone

 

[draxcel]

There is, although probably not enough if you’re using distilled water. That being said, there’s dolomite lime in the Pro-Mix, but according to the manufacturer you’d still want to supplement calcium after the first 10 days or so. If you’re using calcium free water, I believe what’s in the micro is only going to provide less than 40ppm of calcium or so which won’t be enough.

I think that It could be a def indeed

 

[Cobain420]

There is, although probably not enough if you’re using distilled water. That being said, there’s dolomite lime in the Pro-Mix, but according to the manufacturer you’d still want to supplement calcium after the first 10 days or so. If you’re using calcium free water, I believe what’s in the micro is only going to provide ~20ppm of calcium or so which won’t be enough.

Might it be good to try tap water btwn nute to see if there enough calcium in it .

Also the ppm of the water over here is 30

 

[Cobain420]

Might it be good to try tap water btwn nute to see if there enough calcium in it .

Also the ppm of the water over here is 30

Oh also if I give them cal mag supplement do I need to give them at half strength?

 

[tronN00dles]

Might it be good to try tap water btwn nute to see if there enough calcium in it .

Also the ppm of the water over here is 30

I wouldn’t bother with distilled if your tap water is 30, that’s pretty soft for sure. I let mine sit for a couple of hours to aerate and let any chlorine evaporate. My tap water will range from 0-30ppm as well.

I basically follow the 10-part GH schedule, gradually working my way up to 100% of the light schedule. It’s easier to figure out what you should be scaling because GH gives their ppm on their charts, e.g, late bloom is 500ppm on their light schedule. Late veg is 750ppm so I typically scale that to 50%.

Oh also if I give them cal mag supplement do I need to give them at half strength?

According to @Mañ'O'Green ‘s nutrient sticky (great read, btw), your plants should be getting 80ppm of calcium I believe. You can try do the math to figure out how much you should be adding. Your community may have a water report available that says how much of that 30ppm is calcium, and then you can find out how much is coming from the Flora Micro, then the balance (if needed) can come from Cal-Mag.

Having said that, it sounds like yours and my situation is very similar in that we both grow in Pro-Mix with GH nutes and have 30ppm tap water lol. So here’s what I do: I scale Cal-Mag the same as any other nutrient. My last feed was 50% everything on the 10-part, Cal-Mag included. My first time in Pro-Mix I started feeding 100% Cal-Mag right off the bat and scaled the other nutes and I ran into problems. It’s best to keep things balanced, however, GH does say that you can scale Cal-Mag different than the rest if you need to — just be aware that Cal-Mag is also a source of nitrogen, so the more Cal-Mag you add, the more you change your N-P-K ratios by bumping up nitrogen. This is why in my opinion, you might want to look into the 6-part nutrient schedule, as that one includes Cal-Mag within a fully balanced regimen.

One final word of advice, use a quality pH pen that you maintain and calibrate regularly. The cheap Amazon ones simply will not do.