Ultimate PK is ideal for the later stages of flowering, as it is Phosphite-based and therefore increases oxygen flow to the root. The Phosphite is readily soluble and this helps to stimulate root growth as well as harden cell structure.
Advanced Nutrient's Big Bud Coco is essentially a mild, early PK with added amino acids. Its NPK ratio of 0-1-3 means that it can be added earlier (than say PK 13/14) giving your plants and early flowering boost. This results in fruits and flowers being larger, more potent and increases the size of your yield. Big Bud is available in 1L.
Plagron PK 13-14 is a fast absorbing mineral fertiliser, providing plants with extra phosphor and potassium throughout the flowering phase. It results in fruits that are more compact and harder.
Adding phosphorus helps to develop the root system and gives richer and heavier blooms, whilst potassium transports nutrients to all parts of the plants, as well as providing a strong cell structure and helps the beginning of the bloom. Both are essential in the flowering stage.
When using Plagron PK 13-14, your plants are getting everything they need to produce a really strong crop.
Directions of use:
Shake well before use.
Add 2ml of PK 13-14 per 1 litre of water. Use this solution with every watering in the flowering period.
PK boosters are nutrient supplements for flowering plants that are specifically designed to be used during middle and late stages of flowering periods. ... A PK booster simulates a natural chemical change inside a plant, particularly in the ends of the stems where flowers and fruits develop.