Possible deficiency?

[DogterB]

First time grower and I have noticed some yellow spots appearing on some leaves. Looking at the self-diagnose stickies, looks like it could be a few potential deficiencies (calcium, phosphorus, potassium)? I've only just started week 4 yesterday, in fox farm ocean forest and have only given supplements so far (starting a few days ago). So far I've given Roots Excelurator (full dose), Drip Clean (full dose), Multi Zen (1/2 dose, first treatment), Amino Treatment (1/2 dose), Mammoth P, and some molasses (unsulfured). I have yet to use the Soil A & B, since it is in OF, but plan to start it on the next feeding. I did notice a brown leaf tip, but didn't get a pic. I have also noticed some white spots on a couple of leaves. Overall, it's very little but I want to get a jump on this before it spreads. If anyone knows what's going on, let me know and what I can do to help. Thanks!

 

[derek420colorado]

First time grower and I have noticed some yellow spots appearing on some leaves. Looking at the self-diagnose stickies, looks like it could be a few potential deficiencies (calcium, phosphorus, potassium)? I've only just started week 4 yesterday, in fox farm ocean forest and have only given supplements so far (starting a few days ago). So far I've given Roots Excelurator (full dose), Drip Clean (full dose), Multi Zen (1/2 dose, first treatment), Amino Treatment (1/2 dose), Mammoth P, and some molasses (unsulfured). I have yet to use the Soil A & B, since it is in OF, but plan to start it on the next feeding. I did notice a brown leaf tip, but didn't get a pic. I have also noticed some white spots on a couple of leaves. Overall, it's very little but I want to get a jump on this before it spreads. If anyone knows what's going on, let me know and what I can do to help. Thanks!

Looks like the start of Mg def to me. Add epsom salt in your next feeding. Do a search for how much.

 

[DogterB]

Looks like the start of Mg def to me. Add epsom salt in your next feeding. Do a search for how much.

Appreciate it! I'll do that tonight

 

[Mañ'O'Green]

You need to understand that you need to fertigate with balanced nutrients all of the time. The nutrients in the soil do not mix with a single nutrient when you add it. So lets use calcium as an example. You think your plants need calcium so you decide to add 150 PPM of calcium you mix it with PH 6.0 water and feed it to the plant. The nutrients that were in balance (or close to it) in the root zone are now overwhelmed with calcium ions. This locks-out Mg and K until the balance is restored. Soil will over time buffer it. The thing is now you start seeing Mg and K deficiencies not because there is not enough in the soil it is just locked up.

In order to correct a calcium deficiency Mix up all of the nutrients for the week you are in. and add the calcium to it then fertigate. When the nutrients go in mixed at the proper balance they do not lock others out.

This might not be the right chart exactly but it will get my point across. you see week2 veg. everything in the red circle is needed to make a complete balanced fertilization. for that week. They are not optional (unless they say optional). Picking and choosing does not work. They even need to be mixed in order according to H&G instructions.

OF is a wild card in the early weeks because there is just no way to know what is actually in the soil available to the plants. Usually after 2 weeks peeps start applying balance nutrients at 50% strength and then increase by 7-10% each week until tip burn then back off 10%.

You may want to do a mini flush and start feeding at at least 50%.

 

[DogterB]

You need to understand that you need to fertigate with balanced nutrients all of the time. The nutrients in the soil do not mix with a single nutrient when you add it. So lets use calcium as an example. You think your plants need calcium so you decide to add 150 PPM of calcium you mix it with PH 6.0 water and feed it to the plant. The nutrients that were in balance (or close to it) in the root zone are now overwhelmed with calcium ions. This locks-out Mg and K until the balance is restored. Soil will over time buffer it. The thing is now you start seeing Mg and K deficiencies not because there is not enough in the soil it is just locked up.

View attachment 1222156

In order to correct a calcium deficiency Mix up all of the nutrients for the week you are in. and add the calcium to it then fertigate. When the nutrients go in mixed at the proper balance they do not lock others out.

This might not be the right chart exactly but it will get my point across. you see week2 veg. everything in the red circle is needed to make a complete balanced fertilization. for that week. They are not optional (unless they say optional). Picking and choosing does not work. They even need to be mixed in order according to H&G instructions.

OF is a wild card in the early weeks because there is just no way to know what is actually in the soil available to the plants. Usually after 2 weeks peeps start applying balance nutrients at 50% strength and then increase by 7-10% each week until tip burn then back off 10%.

View attachment 1222157

You may want to do a mini flush and start feeding at at least 50%.

Ah, I totally get what you're saying MOG. Yeah, I had just seen so much about OF being plenty enough for a few weeks that I held off. Good to know that people start after 2 weeks in OF. I only have the samples that they sent me, so I don't have the Algen Extract or foliar stuff but have almost everything else. I was just super leery about starting everything too soon. Everything you said makes sense though, I definitely appreciate it. Unfortunately I saw this about an hour after I gave water with epsom salt. In the morning, I'll do a flush and then feed at 50%. Live and learn!

 

[derek420colorado]

Ah, I totally get what you're saying MOG. Yeah, I had just seen so much about OF being plenty enough for a few weeks that I held off. Good to know that people start after 2 weeks in OF. I only have the samples that they sent me, so I don't have the Algen Extract or foliar stuff but have almost everything else. I was just super leery about starting everything too soon. Everything you said makes sense though, I definitely appreciate it. Unfortunately I saw this about an hour after I gave water with epsom salt. In the morning, I'll do a flush and then feed at 50%. Live and learn!

lol that’s why I said add it next feeding. It’s all good though it’s an easy fix and like you said lesson learned.

 

[DogterB]

lol that’s why I said add it next feeding. It’s all good though it’s an easy fix and like you said lesson learned.

Of course you did , my bad D. Oh well, talk about literal growing pains lol

 

[derek420colorado]

Of course you did , my bad D. Oh well, talk about literal growing pains lol

Bro I’ve been growing for 20+ years. And I just let my greenhouse catch on fire due to being careless. Don’t worry, as they say “lessons learned hardest are learned best”

 

[derek420colorado]

 

[DogterB]

View attachment 1222243

Holy shit man! Damn, that’s tragic. My condolences and I hope you’re able to get back at it soon