Veridian Grow is a free set of tools and guides for indoor cannabis growers. The yield calculator estimates your harvest from tent size, LED wattage, grow medium and experience level; the running cost calculator works out what a grow draws in electricity at your own rate; the harvest calculator tells you when to start checking trichomes; and the Plant Doctor matches symptoms to nutrient deficiencies, pests and pH problems. Behind them sit step-by-step guides on grow tent setup, VPD, EC and PPM targets, feeding schedules, training techniques and drying and curing. There is no paywall and no signup required to use any of it — a free account is optional and only saves your Plant Doctor diagnosis history.
Light and experience matter more than tent size. Our yield calculator puts an intermediate grower running a 500W LED in coco at roughly 240–360g (8–13 oz) of dried flower per harvest, and an experienced grower at 600W nearer 400–600g (14–21 oz). Enter your own setup for a specific estimate.
Around 450–550W of quality LED, which is roughly 30W per square foot. Below about 25W per square foot yields fall off sharply, and pushing far past 50W per square foot adds heat and cost faster than it adds flower.
There is no single best brand — what matters is matching EC and PPM to the growth stage and keeping pH in range for your medium. The Academy publishes week-by-week feed charts for Canna, Advanced Nutrients and General Hydroponics Flora Series, plus a PPM chart covering every stage.
Veridian Grow — indoor cannabis growing tools & guides