What Are Additives & Boosters?

Additives and boosters are supplementary products used in addition to your base nutrients. While your core feed delivers essential macro and micronutrients, additives target specific aspects of plant development to maximise results.

Used strategically, they improve root mass, plant strength, nutrient absorption, and flower production.

Each major brand has a lineup of additives that are designed to be used in conjunction with their base nutrients.

Types of Additives We Stock

PK & Flowering Boosters

PK and flowering boosters are designed for use during the bloom stage. These products contain elevated levels of phosphorus (P) and potassium (K), which plants require in greater quantities to support flower formation.

Using a PK booster at the correct time can:

• Increase flower size and density

• Improve overall bud development

• Support essential oil production

• Maximise yield potential

Growers typically introduce PK supplements during mid to late flowering, when nutrient demand peaks.

Silicon

Silicon strengthens plant cell walls and improves structural integrity. Stronger stems help support heavy flowers and increase resistance to environmental stress. When using silicon, you can also expect to see greater resistance to pests.

Rooting Products

Root stimulants encourage rapid root development during early growth. A well-developed root system improves nutrient uptake and supports vigorous vegetative growth. Ensuring you have a healthy root system helps you achieve heavier yields.

Enzymes

Enzymes break down dead organic matter in the root zone. This keeps the growing medium clean and improves nutrient availability.

Calcium & Magnesium (CalMag)

CalMag supplements prevent common deficiencies, especially in coco or when using reverse osmosis water. Calcium supports structural growth, while magnesium is essential for chlorophyll production.

Mycorrhizae

Mycorrhizal fungi form a beneficial relationship with plant roots. They expand the effective root surface area and improve nutrient and water uptake.

Humic & Fulvic Acids

Humic and fulvic acids improve nutrient chelation and micronutrient uptake. They support stronger root systems and overall plant health.

Wetting Agents

Wetting agents improve water distribution within the growing medium. They help eliminate dry spots and ensure even nutrient delivery.

Why Use Additives?

When used correctly, additives and boosters can:

• Improve nutrient efficiency

• Increase flower production

• Strengthen plant structure

• Enhance root development

• Reduce deficiency risk

• Maximise yield potential

They allow growers to tailor feeding programmes based on growth stage, growing medium, and environmental conditions.

When Should You Use Boosters?

Different additives support different stages of growth:

• Propagation & Early Growth: Root stimulants, mycorrhizae

• Vegetative Stage: Silicon, CalMag, humic acids

• Early Flowering: Transition boosters

• Mid to Late Flowering: PK boosters and flowering enhancers

• Throughout the Cycle: Enzymes and wetting agents

Matching the right additive to the right stage ensures plants receive targeted support when they need it most.

Frequently Asked Questions

Do I need additives if I already use base nutrients?

Base nutrients provide essential elements. Additives enhance specific processes such as root growth, flower development, or stress resistance. They are not mandatory but can significantly improve results.

When should I use PK boosters?

Use PK boosters during mid to late flowering when plants demand higher phosphorus and potassium levels to support flower formation and density.