outdoor plants very yellow...help!

[KushmanLP]

so most of my plant are now showing this problem as they all are beginning to flower. during veg i did not give them any fertilizer as none of the plants were showing any problems. i noticed all of the leaves on the plants were turning yellow so i gave them some 20-20-20 fertilizer along with some bonemeal to help with bud production. the plants are continuing to be yellow and maybe getting worse. the water i give them comes from a near by river and sometimes i give them some swamp water from the wholes dug into the ground close to the plants. the plants have been getting worse for maybe 2 weeks now and i'd reallylike to get them back to health soon so the buds grow and plants finish fine. please let me know of what the problem is. if it is a nitrogen def if doesn't seem to be getting healthier with the 20-20-20. if it could be an acidity problem from the swamp water then what should i do to correct this?

Input appreciated.
kushman LP

 

[KushmanLP]

outdoor plants very yellow...help!

can anyone help me out on why a lot of my plants are going completely yellow? they are are budding now and i'd like to get them back to health..

help is appreciated.
Kushman LP

 

[Blackvelvet]

Did you add dolomite lime to your soil mix? 20-20-20 lacks calcium and has very little magnesium and sulfur. Try drenching the plants once with 1 teaspoon per gallon epsom salts from the drug store per gallon of water. They will at least then get mag and sulfur. You might also add 3/4 teaspoon per gallon calcium nitrate. Calcium chloride sold under names like blossom end rot stopper for tomatoes could be added instead of calcium nitrate but will take % ca and net weight of the bottle to give you a rate of about 240 ppm ca. Be aware that 20-20-20 is mostly urea/ammonia. Greater than 50% of your nitrogen being this will cause ammonia toxicity. Plants will begin to literally fall apart when ammonia toxic. Yellowed leaves from things like potassium deficiency will not recover even when applied later.

 

[HuffAndPuff]

Raising the soil pH to make it more alkaline-

It is easier to make soils more alkaline than it is to make them more acidic. Because different soil types react in different ways to the application of lime you will have to add more lime to clay soils and peaty soils than you will in sandy soils to achieve the same result.

To increase your pH by 1.0 point and make your soil more alkaline:
Add 4 ounces of hydrated lime per square yard in sandy soils
Add 8 ounces of hydrated lime per square yard in loamy soils
Add 12 ounces of hydrated lime per square yard in clay soils
Add 25 ounces of hydrated lime per square yard in peaty soils

Correction of an overly acid soil should be considered a long term project, rather than trying to accomplish it in one year. It is better to test your soil each year and make your adjustments gradually. The addition of hardwood ash, bone meal, crushed marble, or crushed oyster shells will also help to raise the soil pH.
-From thegardenhelper.com

Hope this helps,
Stay Safe,
HuffAndPuff

 

[Blackvelvet]

**** thegardenhelper.com Hydrated lime does not contain magnesium.

 

[HuffAndPuff]

Well, in all fairness, KushmanLP seemed to think that it wasn't a Nitrogen deficiency because hitting it with 10-10-10 didn't improve the situation. I'm pretty sure most 10-10-10 formulations also contain secondary and macronutrients- including mg.

Also, yellowng is only one of the symptoms of a Mg deficiency. He didn't mention if the yellowing was occuring in older growth- which would indicate a lack of Mg. It is tough to tell from the photos, it looks like some of the leaves may be "praying for magnesium" but it doesn't look like any of the leaf tips have twisted, so tough to say for certain. Furthermore, there was no mention of any interveinal chlorosis, another solid indication. I also can't see any in the pics. It seemed his primary concern was with potentially acidic soil.

Hydrated lime, although it doesn't contain Mg, certainly wll help make the soil more alkaline. And I just googled Acidic soil remedies, and this seemed like the most appropriate resource to pass on. I cited it so that you can all make your own decision, but to just say "Eff this website, hydrated lime doesn't contain Mg" when neither I nor this website has claimed that it does, is a little rude and hasty.

Stay Safe,
HuffAndPuff

 

[KushmanLP]

outdoor plants very yellow...help!

so thanks for the posts blackvelvet and huff and puff...im pretty sure the problem must be because of the water i am giving them..it must be acidic...you can now really see the deficiencies in the plants i have and they all look the same. very yellow and all the bottom leaves are dying off.the plants are looking very yellow and sick right now as they are trying to bud.
i have some powered lime(not sure if its dolomite ) but i was wondering how much i should sprinkle on the top soil of the plants? to bring them back to a dark green colour. how much lime should i use per plant and how long should i wait before i see if they are getting healthier? should i use the lime more then once? if so how often?
also acidy soil has a high ph? and the point of the lime if to lower the ph?

any input and help is appreciated
KM LP

 

[Guest]

Well for years I used 20-20-20 for outdoor in the veg stage and it worked wonderfully. No problems ever, dark green lush growth. I know dozens of people who still use it outdoors with nothing but success. I don't know BV...ever try it outdoors?

When I used swamp water I had to use a shit load of PH up to correct it. Swamp water is typically very low PH unless you live in an arid alkali region.

I suspect it is a low PH problem. You can by a cheap ph meter that you poke into the soil around your root zone if you are interested in knowing. I consider them a must for outdoor growing and they only ever cost me $5.00.

 

[KushmanLP]

outdoor plants very yellow...help!

thanks for the reply northern farmer. well thats shitty because i sprinkled a bit of the lime around the plant to help lower the ph but if the ph if already too low and thats why my plants are deficient than how am i going to correct this?

 

[Guest]

thanks for the reply northern farmer. well thats shitty because i sprinkled a bit of the lime around the plant to help lower the ph but if the ph if already too low and thats why my plants are deficient than how am i going to correct this?

Like I said, you should buy the PH Meter for a few bucks and check.

As far as lime, you mean Dolomite?

Dolomite can bring your PH up or down depending where it is. It Ph's at 7 (neutral) so if you are really low it will bring you up some or vice versa.

 

[RevolutionX]

i got some yellow probs too..testing the soil this weekend. Maybe too acidic but i buffered with lime. So i dunno. Maybe hungry?