JACKHERERSEEDSBANK

The vegetative stage of plants grown from jack herer cannabis seeds typically lasts between four and six weeks under an 18/6 light schedule, during which the plants develop their signature tall, sativa-dominant structure. Regular topping or low-stress training (LST) is highly recommended during this phase, as Jack Herer plants tend to stretch significantly and can become difficult to manage if left unpruned. Watering should follow a wet-dry cycle — allow the top inch of soil to dry out before watering again — to encourage deep root development and prevent overwatering, which is one of the most common mistakes in soil grows.