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Lowest price we've seen: $119.97 on Nov 7 at Walmart. Tracked across 1 store since Nov 7.
The Humboldts Secret Starter Kit is a complete nutrient system carefully crafted to improve plant feeding performance across all growing environments. Whether you're an indoor gardener or managing a large-scale setup, this six-part kit provides the essential nutrients your plants need at every stage of their development cycle. The set includes Base A B (quart set), Flower Stacker (quart), CalMag Iron (quart), Golden Tree (16 ounce), and Plant Enzymes (8 ounce), all formulated to support vigorous root development, steady plant structure, and consistent blooming. Each formula mixes easily into water, creating up to 150 gallons of nutrient-rich feeding solution that delivers a balanced blend of macronutrients and trace minerals including nitrogen, phosphorus, potassium, calcium, magnesium, and iron. These elements are critical for photosynthesis, cellular function, nutrient uptake, and overall plant vitality. Whether you're working with hydroponic setups, traditional potting soil, or coco coir, our system adapts to your grow style and supports a wide variety of plants including vegetables, herbs, flowers, and leafy greens. Golden Tree includes kelp, carbohydrates, and minerals to enhance plant performance, while Plant Enzymes promote healthy root function by helping break down dead matter. CalMag Iron addresses common nutrient deficiencies, especially when using reverse osmosis or low-mineral water sources. Use the full kit from early seedling stages through flowering and harvest to maintain a consistent feeding schedule and maximize growth. Humboldt’s Secret offers a dependable, easy-to-follow system designed for growers who want to simplify nutrition without sacrificing plant results. Whether you're running a small indoor garden or managing a larger grow space, this kit delivers a well-rounded solution that supports plant health, robust structure, and reliable yield from start to finish.
