Cant figure out deficiency

[stnr420]

Lime reacts with acidic water to do this acid nuetralizing buffering action. Lime runs out when consistently feeding 5.8-6.0ish water. Anything under pH7. Promix and sunshine usually run out of pH buffering capabilities at some point.

If you were to feed above pH7 water into a Dolomite Lime ammended soil mixture, that Lime will sit around and not react.

I beileve all deficiencies seen here are caused by a low pH condition, and continuing to feed nutrients which is driving pH down further and since things are locked out already due to incorrect low pH then adding more nutrients which just act as burning salts and don't get uptaked by the roots anyway which has burned up all the Lime and the natural peat pH is taking over. He states he feeds nutrients 3-4 times in a row, then a clean water every 3rd or 4th watering to prevent buildup, while always watering with pH 5.8-6.0.

Need to raise pH to +/- 6.5

(by any means necessary)


edit- That is a Potassium deficiency. Potassium is locked out below pH 6.

I dont believe that....i use promix and feed 5.9 to 6.3 every watering and never have any problems...along with many people that do the same as well...something else is going on in his medium.

 

[MichiganMedGrower]

Only he is not in soil....he said charged peat and sunshine mix...this isnt soil. I use peat based mix pro mix and always feed 5.9 to 6.3 and never have problems...

Promix website agrees I believe. And sets liming to 6.2 to buffer.

Might be 6.3. Don't have time to check right now.

 

[Johnei]

It's not straight peat or even straight Promix/Sunshine mix.

Straight Promix/Sunshine 5.9-6.3

Once you start adding worm castings, 6.5ish

 

[MichiganMedGrower]

It's not straight peat or even straight Promix/Sunshine mix.

If there is peat and lime in there anywhere between 6 and 7 should work fine. in water culture this is very important. In potting mix the cec (citation exchange) is at work.

 

[papa canna]

Thank you everyone for chiming in. I will reiterate in case there was any confusion:

2 parts Sunshine advanced #4
1 part Charged Peat
1 part EWC
1 part chunky perlite
I also added about 1 cup per 5 gallon pot of pelletized dolomite lime.

 

[Johnei]

If there is peat and lime in there anywhere between 6 and 7 should work fine. in water culture this is very important. In potting mix the cec (citation exchange) is at work.

Post #1 he stated pH 5.8 - 6.2, this is not optimum for a soil containing worm casting, even with the lime. Why not start at a good place to begin with, which would be pH 6.5 and not burnm up so much of his lime. And the lime he added does not work as well as powder anyway.

 

[Johnei]

1cup per 5gallons is too much bro.

sunshine already contains some, and then I usually add 1TBSP powdered dolomite to each gallon of soil and never have to pH whole crop, the pellets are longer term slower to break down, more for conditioning outdoor long term soil beds and gardens, the lime you want to use powdered kind, although the pellets do work, just not the absolute best for our potted short growth cycle type of plants that we want to never have to ph. just sayin. you added about 3 n a half tablespoons per gallon of pellets there and I think that's too much and useless. You Can add too much lime. so just a heads up.. for next time or whatever..

 

[papa canna]

1cup per 5gallons is too much bro.

sunshine already contains some, and then I usually add 1TBSP powdered dolomite to each gallon of soil and never have to pH whole crop, the pellets are longer term slower to break down, more for conditioning outdoor long term soil beds and gardens, the lime you want to use powdered kind, although the pellets do work, just not the absolute best for our potted short growth cycle type of plants that we want to never have to ph. just sayin. you added about 3 n a half tablespoons per gallon of pellets there and I think that's too much and useless. You Can add too much lime. so just a heads up.. for next time or whatever..

It may have been half or a quarter cup. I dont really recall to be honest. It was whatever I found around the forum that was recommended.

 

[Johnei]

I was just going by what you wrote. Ok man. no worries.

 

[MichiganMedGrower]

Post #1 he stated pH 5.8 - 6.2, this is not optimum for a soil containing worm casting, even with the lime. Why not start at a good place to begin with, which would be pH 6.5 and not burnm up so much of his lime. And the lime he added does not work as well as powder anyway.

Agreed about the pelleted lime. Pretty much slow breakdown and I don't know what charged peat is either.

But if the lime is in the correct amount to buffer properly it still is not necessary to adjust ph unless very hard water or very acidic.

The ph adjusting can be the whole problem. Adjusting everything to 6.5 is not good if you keep dumping acid that is not really needed. It would have likely been fine without.

I don't care what growers on forums or pot related silly industry crap says. Just read the tutorial about alkalinity on Jacks fertilizer website or any credible source.

 

[MichiganMedGrower]

1cup per 5gallons is too much bro.

sunshine already contains some, and then I usually add 1TBSP powdered dolomite to each gallon of soil and never have to pH whole crop, the pellets are longer term slower to break down, more for conditioning outdoor long term soil beds and gardens, the lime you want to use powdered kind, although the pellets do work, just not the absolute best for our potted short growth cycle type of plants that we want to never have to ph. just sayin. you added about 3 n a half tablespoons per gallon of pellets there and I think that's too much and useless. You Can add too much lime. so just a heads up.. for next time or whatever..

Yup. Professional soil is measured out this way. That is how everything stays in the plants specific range so we don't have to worry about it.

Pro mix warns to check in case of over liming.

 

[stnr420]

Thank you everyone for chiming in. I will reiterate in case there was any confusion:

2 parts Sunshine advanced #4
1 part Charged Peat
1 part EWC
1 part chunky perlite
I also added about 1 cup per 5 gallon pot of pelletized dolomite lime.

Well there is ypur problem...way too much lime has brought your ph of mediym way too high and is locking out nutes...u dont need to add extra lime in sunshine mix..i dont. Know why people keep doing this...especially the advanced #4 it had coco. Next time just use the mix as it comes standard and ph 5.9- 6.3 and u will be fine. Id bet you check ur runoff ph with all that lime and it will b way too high...

 

[papa canna]

Well there is ypur problem...way too much lime has brought your ph of mediym way too high and is locking out nutes...u dont need to add extra lime in sunshine mix..i dont. Know why people keep doing this...especially the advanced #4 it had coco. Next time just use the mix as it comes standard and ph 5.9- 6.3 and u will be fine. Id bet you check ur runoff ph with all that lime and it will b way too high...

1 cup may have not been accurate. I cant remember tbh. When I watered at 6.5 Ph the runoff was 6.4

 

[stnr420]

1 cup may have not been accurate. I cant remember tbh. When I watered at 6.5 Ph the runoff was 6.4

Hmm hard to say then....i still stick by the theory of keep it simple...straight sunshine or promix...no amendments...then your feed of choice. Good luck