What are /r/kratky's favorite Products & Services?

From 3.5 billion Reddit comments

Growing in a 1/2 gallon amber mason jar. Was doing well, then stopped growing and the leaves started turning yellow and new leaves are showing tip burn.

Nutrients are MaxiGro mixed at the lowest recommended ratio (1tsp/gallon) with pH between 5.5-6.0. When the water gets low, I do a full flush with a clean jar. The water that came out of the last flush was cloudy and had pH 7.0.

The roots look a little dingy, but otherwise healthy, if a little small.

I've already lost a couple of the outermost leaves, which went completely yellow and limp. Sitting maybe 4" under 2x 20w Barina grow lights.

Any suggestions are appreciated.

I'm using GE PAR38 LED grow lights - Amazon link here. And I just have them in generic aluminum reflectors

since you are using pool noodles to hold the plant, I would use a sprouting tray or similar, you can fill the top part with perlite, and put water in the bottom. occasionally misting can help, but I usually cover it with foil with a germination mat until they are just sprouting, then I open it to the light.

typically you can simply grab the plant and pull it out of the perlite, roots and all. they rarely require more than a tap or simple rinse to remove any remaining perlite, which you may not worry about at all.

it is often recommended you grab them by their cotyledon leaves as once their primary leaves develop they no longer need their cotyledon leaves so it has minimal risk of permanently damaging the plant.

using water without fertilizer or nutrient will help prevent algae growth on the perlite, nutrients aren't needed until after the primary leaves have developed anyway, and you should be able to move the sprouts by then.

Barrina LED Shop Light, 4FT 40W 5000LM 5000K, Daylight White, V Shape, Clear Cover, Hight Output, Linkable Shop Lights, T8 LED Tube Lights

Same ones OnTheGrow use.

What I'm using is 10mm, so this one is the right thickness. Unfortunately the pictures don't tell me if these are sturdy enough. I got mine from the guy who did the renovation for me, otherwise I wouldn't have found it myself.

I’ve been using GH Flora series.

You can adjust the component ratios based on the growth stage of the plant.

https://www.amazon.com/dp/B09M942WYB?ref_=cm_sw_r_cp_ud_dp_R7J56M32PDZS7S13T0E2

I also bought some Masterblend after I saw it recommended here, but haven’t tried it yet.

https://www.amazon.com/dp/B072F2BL9D?ref_=cm_sw_r_cp_ud_dp_1QZRRK686W1QGKFB4HYT

Like the others said you prob won’t get fruits with these lights. I started the same way :) a user recommend this to me and they work wonders (best bang for buck in the universe) https://www.amazon.de/WEIATTLE-Pflanzenlicht-Pflanzenlampe-Wachstumslampe-Zimmerpflanzen/dp/B097T9WSXQ/ref=sr_1_16?__mk_de_DE=ÅMÅŽÕÑ&crid=1PU8Y70Y6I0VZ&keywords=50w%2Bgrow%2Blight&qid=1652694524&sprefix=50w%2Bgrowlight%2Caps%2C78&a...

I planted these guys at the end of March and had them in mason jars inside for a bit. Then I moved them outside slowly. Some are still inside as I have to wait for money to allow me to buy more supplies. I'm just using masterblend from Amazon masterblend kit I have Ph up and down formulas to keep an eye on that stuff. I've also been treating with peroxide as needed because I've had a couple episodes with algae scare and I read peroxide was good for that. I built the green house out of just PVC and plastic sheeting to try and keep rain water out of my stuff.

I've been using a 7 gallon tote for 6 heads of romaine. I only put 6 gallons of water in so they have some air space. When they run that about dry I sometimes add about a gallon to a gallon and a half to keep them going. Often tho, I don't even refill it. I just harvest those ones because I have 4 totes on a rotation so I have more than I need without adding water. At the end the tote is about 1/3-1/2 full of roots.

I've had no success with spinach in this setup tho. I haven't researched the possible reasons why though.

Lighting requirements for lettuce are going to be lower than for fruiting plants. Fruiting plants also like to have a warmer color temp when fruiting, but it's not 100% necessary. With that said, I use 3 of these per shelf in my tent. My shelves are 2'x4'. That's 120W ea shelf. They make 2' versions that only use 20W/light as well.

Yeah everything is Kratky in there except the two MJ plants in soil. This was my first try at tomatoes so I used 3 different sized containers from pasta jar up to 5 gal tub. They all put out a lot of fruit, the smaller containers just need rez refills more often. Super happy with how they turned out. The guy at the hydro store thought I was crazy when I told him I was growing these without airstones.

​

Here is where you can get the seeds: https://www.amazon.com/gp/product/B06ZYS65VD

I personally only use masterblend, it's popular for a reason but you do need to take the time to measure it out either by weight or spoons/cups. But when you start using it you don't have buyers remorse-

https://www.amazon.com/MASTERBLEND-4-18-38-Complete-Combo-Fertilizer/dp/B072F2BL9D/ref=sr_1_3?crid=2RW9SI2BSKEYB&keywords=masterblend&qid=1644098104&sprefix=masterblen%2Caps%2C1017&sr=8-3

It has been engrained in me to buy stuff now that I can repurpose as grow vessels. Such as gallons of milk gallons of cider, even laundry detergent it's a sickness lol. A utility knife and some drilled holes can turn anything into a growing vessel.

That's probably true. But it's also appealing that they are low wattage. I ended up using one of these fan's that I've had around . You need a 12v DC power source or an ac/dc converter (I wouldn't attempt to run it on normal household ac outlets since there's an actual warning but it might work). I hook it up to a modest solar setup and it will run all day using only 7 watts. Box fans are rated at around 60 watts for perspective.
https://www.amazon.com/gp/product/B00TWCRZX2/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&psc=1

Monios-L grow lights.

Should be these ones; https://www.amazon.ca/Monios-L-Output-Spectrum-Sunlight-Replacement/dp/B07QFPBQDR&ved=2ahUKEwih-oK6_q7wAhVJRKwKHSzoCQMQFjAAegQIAxAC&usg=AOvVaw0-4ya2o15e9oZLZdcxQhLK

it's just a small float valve. you'd buy something like this:

https://www.amazon.com/Reverse-Osmosis-System-Connect-Fittings%EF%BC%88ball/dp/B076HDV3Z2

and just install it halfway down the bucket. if you've installed a bulkhead on a bucket, this is pretty similar. you install this on the receiving bucket, and in your reservoir (your extra reserve), you install a bulkhead fitting near the bottom and run the line to your receiving bucket.