Athena Stack is a liquid kelp-based plant supplement derived from Ascophyllum nodosum, designed to support plant development through the transition from vegetative growth into early-to-mid flowering. Its simple 0-0-1 formulation provides soluble potash and kelp-derived humic acid, while naturally occurring kelp compounds support plants during the stretch and early flower-set period. Stack is intended as a targeted enhancer alongside Athena Grow A+B or Bloom A+B, not as a replacement for the base nutrients or Athena PK.
• Product Type: Kelp-based plant supplement / biostimulant
• Brand: Athena / Athena Ag
• NPK: 0-0-1
• Soluble Potash (K₂O): 1.0%
• Humic Acid: 0.45%, derived from kelp
• Primary Source: Kelp extract (Ascophyllum nodosum)
• Application Methods: Foliar spray, root drench, transplant drench and seed soak
• Foliar Rate: 7 mL/gal, once weekly
• Root Drench Rate: 1–2 mL/gal, once weekly
• Foliar Window: Final week of vegetative growth through week 3 of flower; stop foliar spraying after week 3
• Root Drench Window: Final week of vegetative growth through week 4–5 of flower / until vertical growth stops
• Transplant Rate: 2 mL/gal; soak bare roots for 30–60 seconds or water in after transplant
• Seed Treatment: 4 mL/gal; soak for 1–2 minutes before planting
• Irrigation Compatibility: Drip, recirculating and run-to-waste systems
• Base Nutrient Compatibility: Used alongside Athena Grow A+B or Bloom A+B
• IPM Compatibility: Can be mixed with Athena IPM for a combined foliar application
• pH Adjustment: Not required at recommended rates
• Mixing: Add Stack last to the reservoir after base nutrients are mixed
• Storage: Natural separation is expected; shake thoroughly before every use
• Available Sizes: 32 oz, 1 gallon and 5 gallons
Key Advantage: Athena Stack fills a different role from Athena PK. Stack is an early flowering/transition-stage kelp supplement, providing biostimulant support and a small amount of potassium without adding phosphorus or significant nitrogen. Athena specifically positions it for the stretch and early flower-set period, while the separate 0-4-5 PK product is used later for mid-to-late flowering.