EC too high after adding Mg and Ca

[Weeded1s]

That my friend is a bad bad mag deff. Sometimes the plant doesnt need cal so when trying to fix the mag problem you add to much ca which then locks up P I believe or something like that. Be careful with adding extra stuff. I dont use those nutes so im not sure if neccessary or not. What I do know is my plants looked like that when I was using hr veg bloom and that is mag deff if ive ever seen . Watch out for nanners now as that plant is stressed to say the least.

 

[newtothiscoco]

in veg's i use 4 ml pr gallon of something called sensi CalMag with 10/5/5 of the ghe 3 part and it have never burned my plants yet. and im using tap water that has ben sitting in 48 hours before it gets mixed

so you are sure you did chek the ph that day you stuffed the Cal Mag in your water ? coz this stuff of mine is rising the ph

 

[DropDropDrop]

Still saying it's too big of a pot for plant of that size and not too much leaves to evaporate the water.
If your pot didnt get dry in the top after 3 days and now you're watering everyday it's too much and uneven watering will make nutrients to lock. Im using very same type of tapwater and never added any calmag and it's really not a problem.

 

[LSWM]

Looks like over watering or general neglect from that last pic. Hard to say but she doesn't look that big for that pot. Coco will grow plants twice the size of the pot just from hand watering.

 

[The.Cook]

Man if 6lt of coco coir are able to retain 1,5lt water without draining it means you're lettin those ladies die thirsty!

Also, dry medium means salts build up (expecially the hydroton layer on the bottom, it get dry really quick, water component in the nutrient solution evaporates and only salts are left behind), this cause root burnt and those crispy leaves are a quite explicit sign of this.

Make a very slow irrigation with usual nutrient solution till some starts draining from the bottom, collect the drain and check ec value. If I'm right you should find it well above the inlet ec.

in that case, I'd suggets to wash the substrate with a mild nutrient solution (1,4mS final ec should be fine to me) till drain ec and inlet ec gets at the same level. Check for it the day after too, as coco has a quite high CEC and it takes some time to buffer it.

Bye!

 

[Brugge]

The.Cook - you're right. The EC value of the run off was 3.6 (feeding a little above 1). So things improved a lot after putting her in a bigger pot (without the hydroton). She's ready for harvest this week. A very low yield but that's ok I don't use much at all. She also had thrips as well as my clones... so that's what I'm trying to fix now

 

[papaduc]

Those plants are fried mate. Next time ditch the mono elements.

If you want a healthy plant, buy a good one part veg feed & a good one part bloom feed.
Use them both at 1.0ec total and never see these problems again and multiply your harvest by 10x.

Cannabis is so simple... until you fuck with it.

 

[Rollout]

Some plants act different to root spacing but u can get 5' plants with 6 to 8 zips out of a 6 ltr pot. If ur roots aren't completely filled Id wait.

I hope so. I'm using 6L pots now, first time I've ever used pots that small. 6 per 1000 watt light. Hoping for good results.

 

[Miraculous Meds]

Yep I was surprised u could do it too. I think I first seen it he H3ads coco thread. I think he was hand watering too. I liked when they are going good, setting them up on auto watering 4 to 6 times a day.

 

[The.Cook]

The.Cook - you're right. The EC value of the run off was 3.6 (feeding a little above 1). So things improved a lot after putting her in a bigger pot (without the hydroton). She's ready for harvest this week. A very low yield but that's ok I don't use much at all. She also had thrips as well as my clones... so that's what I'm trying to fix now

Good to know!

Next time drop the hydroton layer, it only makes damages!

Also, small pots + multiple feeding are definitely the way to go with coco, it absolutely speed up plants metabolism! I use 5.5lt pots starting with one feeding up to 3/4. Just ensure run off at every feeding adjusting pump on time. When coco gets quite between feeding, add another one and so on

That way there should be no need to flush or whatelse. Just keep an eye on runoff ec and if it get high (that usually happens when run-off is not enough, and/or nutrient are not exactly balanced.) Just manually water with nutrient solution slowly till run off get fine!

 

[Rollout]

Yep I was surprised u could do it too. I think I first seen it he H3ads coco thread. I think he was hand watering too. I liked when they are going good, setting them up on auto watering 4 to 6 times a day.

I'm planning on just hand watering once a day. Is there a big advantage to multiple times per day?

 

[Miraculous Meds]

I used to think so but im not sure really. It seems that if u have the right kind of medium that can handle it, then u can get faster growth and maybe a little more production. Kinda the advantages of hydro.

 

[Rollout]

When I used rockwool cubes I would feed twice a day, but just out of necessity. With coco I could see it being better since the medium stays at a non saturated level. Is that the goal? Or do you keep them pretty soaked?

 

[Miraculous Meds]

When I used rockwool cubes I would feed twice a day, but just out of necessity. With coco I could see it being better since the medium stays at a non saturated level. Is that the goal? Or do you keep them pretty soaked?

Never dry, but u don't want them to where u can squeeze out a bunch of water. So the amount u can water is determined by how well the roots have established and how big a pot u have per plant size. U have to feel out each situation differently. I could water my 6.5 ltr pots 6 times a day when they were fully filled in and mid way thru flower. But after first transplanting from a 4" pot I would hand water until they dry a bit, until it needed it at least daily, then Id set up my watering system and start at 2 times a day and increase from there as they grow.

 

[The.Cook]

As Miraculous Meds said, it all depends on pot size and root mass.

Quite important to let Coco dry out a bit (it should not be allowed to completely dry on top, for example) till root mass is big enaugh.

Here comes the pot size matter, the bigger the pot, the latter the root system will completely colonize it.

Once root system is big enough u just can't overwater coco, really. That's the time you start adding multiple feeding. At that point, you'd like to never let it get dry.

Regarding advanteges, coco in big pots with daily feeding gives results comparable to dirt, while coco with multiple feedings gives results compareble to idro (in terms of grow rate)

I'd also add it's way easier to multifeed coco in small pots, than handwater bigger pot. No chance of salts built up, over/under watering, better oxygenation, faster metabolism etc etc

bye!

 

[Rollout]

Thanks guys. I'll step it up to at least twice a day, maybe more.

 

[LSWM]

The only real issue with setting up a drip is handling runoff. Once you have a system for dealing with it, the drip system will be the best decision you ever make. It will give you bigger, healthier plants, in less time, with smaller pots, and less media, as well as reduces your workload immensely. It is rather inexpensive to setup as well.

$15 for a 396 GPH pump
$20 for some poly hose and fittings
$15 timer
$10 rubbermaid bin for a rez.

The Eco Plus pumps are not the most reliable, but they get the job done just fine. $15 for a 396 GPH pump is a steal, so cheap that it's easy to have a few extras on deck just in case.

I have tried 5 gal, 2 gal, 1 gal, and the difference in growth rates between them is significant. The smaller the pot you use the quicker the roots fill the pot, and the sooner you can start hitting them with multiple feeds per day. Once you hit multiple feeds the plants explode. If you don't start multiple feeds you can easily see the plants stall out once they get too big for 1 feed per day in their size pot. As soon as you give them a second feed they can literally double in size. 2 Gal pots I think are capable of producing 3/4-1# plants, possibly even bigger.

 

[Miraculous Meds]

Well stated Cook. U articulated it how I wanted too. Spot on. Great info too LSWM, I would just add if ur goal plant size is close to a lb or more id go with 3 to 4 gal vs the 2.

 

[Rollout]

Wow. That's pretty amazing if that's what a 2G pot of coco can do.

I should have no problem at all then. I was a little worried but that puts my mind at ease. I have almost all 6L pots, with a few 9L also. And there are 6 under each 1000 watt light. So from what you guys are saying this should be about perfect.

 

[Miraculous Meds]

6 under a 1000 to get a gpw as a goal would mean u need 167g a plant, or about 6 oz a plant. The medium can certainly get u to those numbers. Now just gotta dial everything else in to get there. Easier said than done, in my experience. lol