question about nutes for hydro.

I am thinking of trying my 1st small hydro grow. I have 2 autoflower seeds. I seen on fox farm hydro feeding schedule, it says grow big 2 tsp per gallon. So my question is, if my hydro container holds 3 gallons of water. I would add 6 tsp? I am asking because I dont wanna waste nutes if I dont have too.

if you're considering to do hydro, seriously you absolutely need a ppm meter. 2tsp/gal = 6tsp/3gal, but these figures are worthless. how many grams is a tsp and how do they know what your plant needs now?

I agree, the best way to be sure is to invest in a TDS meter (ppm), in my experience it's the best way to be sure of the strength of your nutes, especially for hydro, seems to me manufacturing suggestions are always way too high.

first time hydro guy myself, and meter saved my plants. Followed the GH label for the first week tell my meter got here. I was easily double what I shoulda been at and burnt em a bit but luckily got the meter quickly and adjusted. Label is a great place to start but not a guide I follow. Too many factors on the plant side can determine what PPM you need to be at as well. We could both be in "early vegetative" (which my GH bottle uses as one bracket) but if your plants is twice the size of mine...gonna need mo food

yep PPM/TDS/EC meter and a PH meter should be your verry first investments when starting out hydro.

you will want to start out at about 150 ppm during seedling phase and increase to around 600-800 ppm during veg cycle. then in flowering cycle start out at 600-800 ppm and work your way up to around 1400 ppm then if plant looks good keep it at 1400 if it looks hungry add more ppm if it looks burnt lower the ppm.

really as long as your PH is in order you have alot of lee way when it comes to PPM. i dont even measure anymore. i top off my rez every day and every 3 days dump a glug or 2 of nutes in. i check my PPM every couple weeks.

Yea, TDS meter are cheap now, I got one off Ebay for price of a Whopper with fries, yes, be careful with manufacturers recommendations, they want you to use it fast and by more LOL.

In my 30 years gardening experience I found their application rates apply to outdoors mature heavy feeders plants, for potted indoor plants cut the max rate by half or better, for young starters 1/4 is plenty.

When I go through hundreds of pictures or sick and dying plants posted on this and other forums 90% + of fatalities are a result of overfeeding or overwatering and perhaps 10% bugs.

If you are doing a dwc bucket you might run into problems with fox farm and other organic based nutes.

It is my understanding ( and yes i may be wrong lol) that a meter (ec/tds) is useless with an organic setup? Perhaps someone could clarify!