I am a commercial hydroponics grower and I also grow soil crops, all indoors in greenhouses. I use hydroponic nutrient
once a week or so in my soil grown crops. I use an Anderson injector to irrigate all of my soil grown plants, adjusting the ammount of fertalizer and acid for pH control as needed. The plants seem to really appreciate the hydroponic nutrient, it makes them even greener than our standard greenhouse feed does.