How to flush plants Outdoor?

Dear growers, How will I flush my outdoor plants(4 plants 1-Flowerbomb Kush 3-Bagseed) without enough water? I have 1 gallon container with me all the time, and it is not possible to find water in the jungle. I need your help indeed!!!!

Stop feeding extra early or don't feed, or don't flush at all and keep feeding

Well your screwed flushing is done to take salts and fert away from your plants when water FLOWS away no flow= no flush man up and bring more water