Grow Mediums Think Different - 2x MS0006 - AN PH Perfect Grow -=CALCIUM PROBLEMS=-

[Smeghead]

Hi everyone, I'm on my 2nd hydro grow. I had bad Calcium deficiency problems the first time. I'm growing a Think Different this time and I've been applying Calcium Nitrate as a foliar feed everyday.

How do I keep this Calcium def problem under control for the rest of my grow? I'm on week 3 now and have kept the yellow rust spots to the first set of leaves. I'm using 1gr of Calcium Nitrate to 1ltr of PH water, is that the right amount or should I increase the amount of Cal Nitrate if spots are still appearing?

Should I use Cal-Mag instead of Calcium Nitrate?

I really want to nail this grow with my first DP Think Different. Can you guys also link me to a grow journal like mine? What EC should I at for week 3-4? I'm currently at 1.0 EC.

 

[lykaboss]

Are you seeing purpling in the stocks, stems or leaves? I had the same issue, i kept dumping more calmag and it didn't fix it. What i did to fix my problem was do 2 mls of calmag per gallon and 1/8th of a teapsoon of epsom salt per 3 gallons of water. This seemed to stop the spotting and all the new growth was very healthy.

Hope this helps

 

[Smeghead]

Not seeing signs of mag def, only yellow "rust" spots.

Has anyone else used a calcium nitrate foliar spray or had calcium def before? On the last grow, I had the same thing. Everyone said it was calcium lockout due to the AN nutes.

 

[derek420colorado]

What is your PH? Calcium is one of the trickier nutes that I have found with Canna and PH over 5.9 in hydro will cause Cal def from what I have seen. Try doing a Cal/mag feed only with water that is a little lower in PH like 5.6 or so, most strains I have grown(they were photo) prefer a slightly lower PH when trying to absorb Calcium, I always seem to get a Cal def if my PH is over 6.0 or so.

Before your next feed schedule try PH adjusting and just feeding the Cal wait a day or two then feed as normal. This should clear up any Calcium def if it is present.

I am sure you know that PH is very imporant when growing Hydro but a lot of people don't know exactly what nutes get absorbed at different PHs. Some strains can be very very sensitive to PH and nute abosorbtion. Like with Blueberry from DP I literally had to check the PH 3 or 4 times a day because they were always so dang particular about getting their nutes at the correct PH, that is why it is believed to be a harder strain to grow in my Humboldt opinion is due to her need for correct PH.

Even with foliar feeding your PH has to be right or the plant won't get the nutes because your plant is full of PH'd water it has to be correct or the plant cannot use it. Hope this has helped if it does not correct the problem it may not be a Cal def. Pictures would help greatly if you can get them

 

[Smeghead]

My PH has been at 5.8 which I check everyday. I did a rez change on Sat and changed my nutes to a local chemical brand instead of AN. The Npk is 21-10-35 and I set the ec to 1.0. I lowered my ph today to 5.6 as advised and will keep an eye on it.

The first 4 leaves have bad necrosis now bit new growth has only a few spots but I definitely want to fix this grow.

Here are some pics:

 

[Smeghead]

latest news is that I have a rental agent coming over monday to sketch the floor plan of our unit so I have to evacuate the girl into somewhere creative.

She's doing much better after lowering the PH and moving to a different nutrient. Not sure which one was the contributing factor but all new shoots are spot free and nice and healthy.

Now, I just need to dodge the rental agent on Monday. How long will she survive without air pumping in the rez or should I take her out of her rez and put her in an empty spare bucket?

 

[pop22]

What is your PH? View attachment 391517 Calcium is one of the trickier nutes that I have found with Canna and PH over 5.9 in hydro will cause Cal def from what I have seen. Try doing a Cal/mag feed only with water that is a little lower in PH like 5.6 or so, most strains I have grown(they were photo) prefer a slightly lower PH when trying to absorb Calcium, I always seem to get a Cal def if my PH is over 6.0 or so.

Before your next feed schedule try PH adjusting and just feeding the Cal wait a day or two then feed as normal. This should clear up any Calcium def if it is present.

I am sure you know that PH is very imporant when growing Hydro but a lot of people don't know exactly what nutes get absorbed at different PHs. Some strains can be very very sensitive to PH and nute abosorbtion. Like with Blueberry from DP I literally had to check the PH 3 or 4 times a day because they were always so dang particular about getting their nutes at the correct PH, that is why it is believed to be a harder strain to grow in my Humboldt opinion is due to her need for correct PH.

Even with foliar feeding your PH has to be right or the plant won't get the nutes because your plant is full of PH'd water it has to be correct or the plant cannot use it. Hope this has helped if it does not correct the problem it may not be a Cal def. Pictures would help greatly if you can get them

interesting ph chart. most I've seen say keep ph 5.7-6.3. If you had cal/mag problems at a ph of 5.9, you had something else wrong. 5.9 is the ideal middle of the road for hydro. I maintain my res at 5.8-6.3. I don't sweat PH rise unless it goes over 6.3., and I've had no issues at all. In fact, a rise over a few days in PH is a good thing, it allows nutrients that absorb best at different ph levels to all reach optimum for a period.
My res right now is at 6.2 PH, and 565 ppms of nutes + cal/mag in RO water. I'm running 76 ppms of cal/mag.

Foliar feeding can help slow a cal/mag problem, but it won't fix it. If your using tap water, try filling your res with RO ir distilled water next time, you can buy it buy the gallon at any supermarket, etc.

 

[pop22]

Also, ph of 5.6 or lower in hydro can invite acid loving fungi to develop in your res water.

 

[derek420colorado]

Also this was with DP's Original Blueberry, that is the strain I stuck with for years and it is in my opinon one of the hardest to get max potential out of due to there finicky nature for correct ph, it took me several grows to get it right and I have found that other strains are not nearly as particular but then some are. This pH chart is just a guide as is most of the stuff I say. I spend time with my plants and they speak to me for the most part, I only know about the more specific aspects because I am ocd and a nerd lol I actually think that Ph chart may be from Dutch Pro but then again I cant remember where I got it. It has always served me well as a general guide to nutrient uptake.

 

[pop22]

I know they can be nute fussy for sure. And yes I understand. My growroom is also my computer room, so I spend a lot of time with my plants!