The growth rate of plants, health of plants, and plant yield are improved bythe use ofstructured micro-water for irrigation. Water with an Oxidation ReductionPotential ("ORP")reading of -1 mV to -1100 mV and containing dissolved hydrogen from 10 to10,000 ppb hassmaller water clusters and is easier for a plant to absorb through the plantsaquaporins. Structuredmicro-water having these parameters is obtained by equipment employingelectrolysis/ionization orthrough the addition of certain chemicals.