ปุ๋ยที่ผสมแล้วเก็บไว้ได้หรือไม่นานเท่าไหร่

If you are talking about the left over mixed up fertilizer that you did not full use after making it into a feeding solution, it is good until it starts to change, this could be colour, smell or forming precipitate. Things will grow in the water and change it like algae or fungus like yeasts and molds. Good rule of thumb use it within a weeks time. If you are talking about the bulk concentrated bottles your dilute into bigger jugs of water, its good for years. Ideally 2-5 max unless its a dry powder being reconstituted. If your talking about collected runoff from watering your plants and wondering about that, I'd day a few days. However it's not best to use that stuff unless its outdoors. Can contain a lot of excess salts. Best Of Luck & Happy Growing! ***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details: growdiaries.com/giveaways/GotM-August-2022 Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***