FoxFarm’s Big Bloom Liquid Plant Food
Big Bloom Liquid Plant Food by FoxFarm is a blend of organic inputs that include rock phosphate, sulfate of potash, and Norwegian Ascophyllum nodosum kelp. The product also contains high concentrations of worm castings and bat guano used to fortify flower production.
With a 0.01 – 0.3 – 0.7 NPK profile, Big Bloom encourages strong flower development and thick bud structure. This environmentally friendly organic bud hardener is formulated to produce dense, trichome-rich colas. Application rate recommendations vary between 2 – 4 Tablespoons per gallon depending on the growth stage.
Incredible Bulk Organic Bloom Booster by Growganica
Incredible Bulk is an eco-friendly, vegan bloom booster listed as OMRI approved for organic cannabis growers. With impressive 0.1 – 10 – 25 NPK ratios, Incredible Bulk is a powerful punch of potassium to encourage energy transfer during the flowering stage.
Enzymatic activity and the formation of proteins and essential oils increase with the hefty dose of sulfur in this product. Additionally, sea kelp is included in this dry formula with its array of micronutrients, promoting densely packed buds. Recommended application rates start with ¼ tsp./gal and gradually increase to a maximum of 4 tbsp./gal.
Best Synthetic Bud Hardeners
Big Bud by Advanced Nutrients
Advanced Nutrients Big Buds is a popular bud hardener for hydroponic and soilless growers. With 0 – 1 – 3 NPK proportions, this formula provides good phosphorus to potassium ratio for flower production. This product also contains 20 different L-form amino acids, which are essential for building proteins, phenols, and alkaloids in addition to terpene production.
Additionally, Big Buds contains citric acid that helps marijuana plants transform sugars into energy, building big, thick buds throughout the canopy. Advanced Nutrients Big Bloom is one of the more popular bud hardening products in the cannabis nutrient market, boasting a 20% increase in yield with its use. The recommended dose is 1 tsp/gal or 5ml/litre.
KoolBloom by General Hydroponics
General Hydroponics offers KoolBloom bud hardener in two different formulations. The first, a liquid form with NPK ratios of 0 – 10 – 10, is recommended during the early stages of blooming. This recipe encourages the production of essential oils and fragrances while building a solid base for flower development.
The second formula is a dry concentrate bud hardener used in the last 1 – 2 weeks of flowering to stack the plant. Dry KoolBloom has NPK ratios of 2 – 45 – 28, which targets the bud hardening process. Both KoolBloom products contain the secondary nutrient, sulfur which aids in the activation of amino acids, proteins, and essential oils. Recommended dosing of the liquid varies through the flowering stage, whereas the dry concentrate is limited to ¼ tsp/gal.
Botanicare Hydroplex Bloom Enhancer
Hydroplex Bloom Maximizer is another favourite bud hardener for seasoned marijuana growers. With a 0 – 10 – 6 NPK profile, Botanicare added amino acids, trace minerals, and vitamins to its’ Hydroplex recipe. This combination helps support plant development by encouraging enzymatic activity while elevating chlorophyll, oil, and sugar production.
The product promotes a healthy, strong flower structure encouraging thick, condensed cola formations. The PK boost helps marijuana plants overcome external stress while amplifying bud size and density. With a low dilution rate of 2 – 5 ml/gal, Hydroplex Bloom Maximizer is an economical option for hydro growers to save money while increasing bud thickness.
Hawaiian Bud by Grow More
Grow More’s Hawaiian Bud is a high phosphorus fertilizer designed to produce heavy bud-dense colas. With an NPK ratio of 5 – 50 – 17, Hawaiian Bud pushes energy transfer into flower and bud production. Accompanied by trace elements zinc, boron, copper, iron, manganese, and molybdenum, this urea-free formula promotes essential oil and resin production.
Additionally, humic acid and Norwegian kelp extract push bud development throughout the flowering stage resulting in solid, firm buds. Recommended doses range from ¼ – 1 tsp/gal beginning in the middle to late flowering phase depending on other nutrient inputs.