All three crops were reported to produce higher yields than their control plants.

Spinach showed the largest source-reported yield difference at approximately 30%, followed by kale at approximately 25% and alfalfa at 20%. The source also describes visual differences in foliage color, plant size, germination and alfalfa density.

The supplied case reports approximately 30% higher spinach yield, approximately 25% higher kale yield, and 20% higher alfalfa yield in Crop Booster-treated plants compared with controls. Raw harvested weights, yield per hectare, plot areas, plant counts, sample sizes, replication, and statistical analysis are not supplied, so these percentages cannot be independently recalculated. The source also describes spinach and kale as having much higher germination, greater plant size, and darker green color, while treated alfalfa was described as denser with darker green foliage. No germination counts or percentages, plant-height measurements, biomass measurements, canopy-density measurements, SPAD, chlorophyll, NDVI, or other instrument-based measurements were provided for these observations. They are therefore presented as qualitative/source-reported findings. No fertilizer, pesticide, irrigation, production-cost, revenue, or economic-return comparisons were supplied.

Why this matters for mixed-crop growers: This Johannesburg case reports higher production across three different crops grown during the same seasonal period: approximately 30% higher spinach yield, approximately 25% higher kale yield, and 20% higher alfalfa yield compared with their respective control plants.