4 Weeks left, plants need a boost. What to use?

I'm about 5 weeks into flowering. My ladies are in 5 gallon pots with a custom 'super soil' type mix. Indoors under 1000 watt HPS.

Bud growth is looking pretty slow on all plants, and I'm already starting to get some yellowing on the lower leaves this early into bloom. I think they've probably used up most of the phosphorous in the soil, and nearly all the nitrogen. They look healthy and strong, but just not filling out at all.

So my questions is, with about 4 full weeks left of blooming, and looking like my soil is getting somewhat depleted, what should I give my ladies to fatten them up and get them to the finish line with a decent yield?

these are the nutes I have at my disposal:

high phosphoros bat guano,
high phos fishbone meal,
pre-mixed powdered 'power bloom' 2-8-4,
liquid kelp,
fish emulsion,
molasses,
rock phosphate,
greensand,
epsom salts,
dolomite lime
blood and bone meal
earthworm castings

So what recipe do you recommend? And what method - A top dress? - A tea? Both?

Thanks for any tips. I'm still not so learned on how organic nutrients break down over time, so I really don't know how much to feed them, and how long it will take before I need to feed them again. Pointers apprecaited.

Hi Buggins,
Im thinking with the yellowing and bud growth a little behind,maybe a little calcium,magnesium and a Tablespoon or two of guano tea.Im sure the guano wil be broken down and absorbed and utilised within say 3 weeks,micr nutes like calcium and magnesium can be flushed,but are in minimal amounts anyway...I think the yellowing maybe the cal or mag,but o boost of guano with 3/4 weeks to go is very fine idea to do..i use it up to 15 days before cut...flush a week and im fine.hope it helps a little..
If you have sulphur that can boost the nute uptake.....B

That does help, thank you. What would you recommend for cal and mag - dolomite lime?

And your guano tea, what is the recipe if you're only using a tablespoon? It must be very concentrated

Would this be preferably to top dressing with guano?

Thanks

Dolomite Limes what ive always used..I prefer a small glass of water and mix guano in that till mushy,i then throw that into a litre of water with a few drops of hydrodgen peroxide,mix it up and feed.
Top dressing guano im sure has its plusses, but this is the way i feel comfortable doing it.....B

Top dress with some more concentrated soil. Also add some dolomite lime to at the top. Add a little enzyme for a boost, like fulvic or humic.

Water in with some molasses. For added benefit, put in an actively aerated compost tea as well.

buddha webb said:

guano in that till mushy,i then throw that into a litre of water with a few drops of hydrodgen peroxide,mix it up and feed.

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You do understand what hydrogen peroxide does right?

molasses!!! plants love some sugar about 30days or later during flowering.

I agree with the molasses.

Afka said:

You do understand what hydrogen peroxide does right?

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The way you're asking I have to wonder if you do.

~~~> http://www.using-hydrogen-peroxide.com/peroxide-garden.html

Hopefully your mycorrhizae enjoy chemical genocide as peroxide rips them to shreds >_< As a supporter of TOO (true living organics) I would never recommend anything that kills the good along with the bad for a tiny bit of extra oxygen to the roots. I would suggest this as a last ditch effort to stop fungal infections but if you manage to get one you probably shouldn't be using soil. Also don't forget to re-culture your friendlies

TrichomeTrent said:

Hopefully your mycorrhizae enjoy chemical genocide as peroxide rips them to shreds >_< As a supporter of TOO (true living organics) I would never recommend anything that kills the good along with the bad for a tiny bit of extra oxygen to the roots. I would suggest this as a last ditch effort to stop fungal infections but if you manage to get one you probably shouldn't be using soil. Also don't forget to re-culture your friendlies

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My girls seem to like it.

If you read the link I posted it goes on to tell you how H202 is formed naturally by rain passing through the atmosphere.

Hehe, hydrogen peroxide is like putting a blow torch to the microbial colony.

If you really must supply some aeration, just supply aerated water.

Or, supply carbonated mineral water, like Perrier, by either root drench or foliar spray.

H2O2 used in an indoor soil grow? Hmmm.... it's not something I would do.

This sounds like a case of where somebody's mixed up their hydro and soil growing information.

420God said:

My girls seem to like it.

If you read the link I posted it goes on to tell you how H202 is formed naturally by rain passing through the atmosphere.

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Read the whole thing actually. Talks about how rain passing the ozone layer becomes h2o2 (peroxide) but mostly dissipates as it oxidizes pollutants in the air. Judging by the description only a tiny fraction if any would actually reach the ground as h2o2. Im assuming this actually helps plants by possibly oxidizing and causing particles to precipitate with the rain itself, or maybe just the breath of truely fresh air after the rain. If h2o2 actually reached the ground it would destroy the mycorrhizae in the soil and reek absolute havoc on the ecosystem. Since we live in a relatively lush world im pretty sure its not happening.

TrichomeTrent said:

Read the whole thing actually. Talks about how rain passing the ozone layer becomes h2o2 (peroxide) but mostly dissipates as it oxidizes pollutants in the air. Judging by the description only a tiny fraction if any would actually reach the ground as h2o2. Im assuming this actually helps plants by possibly oxidizing and causing particles to precipitate with the rain itself, or maybe just the breath of truely fresh air after the rain. If h2o2 actually reached the ground it would destroy the mycorrhizae in the soil and reek absolute havoc on the ecosystem. Since we live in a relatively lush world im pretty sure its not happening.

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You're pretty sure it's not happening. Sounds like you know what you're talking about.

Guess the extra growth I had after I actually did some testing was just a fluke.

420God said:

You're pretty sure it's not happening. Sounds like you know what you're talking about.

Guess the extra growth I had after I actually did some testing was just a fluke.

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The extra growth you were seeing could have been down to the extra oxygen atom present in your water. But your friendlies which are there to help breakdown the organic nutrients you use into inorganic ions for the plant to use are being murdered.

Even I know this and I grow in hydro and never used organics.



J

Hey,
just to defend my opinion,i was mentioning h2020 as i have always had huge benefits from it,possibly because i live in very hot and humid conditions so if i didnt use it i would suffer from root or stem rot which h2020 helps.It kills a little good and bad soil bacteria,im talking to be used in the amount of 1ml a litre,very low doses 3%..The environment is saturated in H2020,rainfall carries only a very small percentage,but theres a lot of rain...Its proven rain water is more beneficial because of higher levels of H2020,and less chlorination.The OP only had 3 weeks to make his plants pick up so thought it may help.....Its used widely among soil growers,and has been for a long time....I use it as a pesticide too with neem,2/3 ml in a litre of water....Great stuff.Living up a mountain,theres not many grow shops so i do what the farmers do.....The friendly bacteria in the soil receives a little loss,and equally the unfreindly bacteria takes a knock,but it certainly produces the ability to hold and use the extra oxygen..
And whether were right or wrong,whether h2020 is the work of Shiva or Shell,i salute your passion to our flower,may you roll it up forever............B

jondamon said:

Even I know this and I grow in hydro and never used organics.



J

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Apparently you don't and you're just going off what you're heard.

I make my own compost and add nothing else to my grows, I am 100% organic and have great results with using a diluted solution of H202 with every watering.

It's been proven to work.

Getting off topic. I don't use h202 in my soil and won't start anytime soon so let's move on.

Gave them a top dressing of bat guano and a couple tablespoon of organic dry mix power bloom fert.

Made a water solutio with a tablespoon of mollasses, fish emulsion, and liquid kelp.

Wel see if that helps to pick things up a bit.

Buggins said:

Made a water solutio with a tablespoon of mollasses, fish emulsion, and liquid kelp.

Wel see if that helps to pick things up a bit.

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Considering my previous comment was not at all helpful, I was comin' in here to suggest you do exactly what you just did.

Good job