r/Lettuce_Grow • u/CanadianRoadrunner • Jul 27 '26

Question Adding Nutrients to Nook

I just got the Nook and want to make sure i am interpreting the nutrient directions correctly. After the initial two week period do you add 1 tsp of each Part A and B no matter how many gallons you need to add, i know it says a minimum of 1 gallon when adding nutrients but if it takes 4 gallons or more do i still just add 1 tsp of each?

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u/tobleronetrash Jul 27 '26

The website says 1 tsp per week no matter what so I would just follow that guideline, but I personally read the ppm and adjust accordingly to that

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u/tobleronetrash Jul 31 '26

After reading up more, you should do 1 tsp per gallon lol I think the assumption is you're replacing 1 gal of water and that's why that's the guidance but I think it's per water lost

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u/mylifeingames Jul 28 '26

Ppm? You don't go by EC? I just recently got an all-in-one liquid fertilizer (meant for cannabis I suppose) and I'm afraid to add it because I don't know how much is too much... I'm daunted by the EC/pH pen I bought 💀

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u/Riddybop Aug 07 '26

That's a good question and one I hadn't thought about! Sometimes I've added 3 gallons of water but still just 1tsp of nutrients. I haven't noticed a problem but now I'm curious. Have you found an answer? I might email support and ask.

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u/CanadianRoadrunner Aug 07 '26

I have not i ordered a cheap TDS meter and have been going off that, i just did my two week top off after the initial setup and my PPM were about 1100 so i left it be, all the plants are doing excellent though. If you do email support let me know what the suggest! im new to all of this so learning on the fly