Hi Shadlar –
While many growers use Budswel only in flower, it can be used from week 3 until the second to last week of the plants life cycle..
DIRECTIONS FOR USE:
Houseplants: Mix 1 to 2 Tbsp per gallon of water and use as needed.
Outdoor Gardens: Use 1 or two cups per 5 gallons of water.
Hydroponics: Shake well and add to nutrient reservoir as needed.
Hope it helps!