Granddaddy Purple Seeds

Granddaddy Purple is a feminised, photoperiod cultivar presented in the Kiwi Seed Bank catalogue. Purple Urkle and Big Bud genetics combine in an indica-dominant profile suited to growers with some previous experience. Plants can show deep colour, dense flowers and a sweet fruit-led aroma when conditions are well managed.

Genetics & effects

This hybrid is approximately 70% indica and 30% sativa. THC is listed at 17–23%, while CBD is listed at 0–0.4%. Individual results can vary with phenotype, environment and cultivation choices.

People often describe the experience as relaxed, calming, happy or euphoric, sometimes followed by sleepiness or increased appetite. These are subjective impressions rather than assured outcomes. The flavour profile may bring together berry, grape, sweet fruit, earth, pine and herbal notes. Myrcene, beta-caryophyllene and pinene are prominent within the listed terpene profile.

Explore feminised seeds, high thc seeds, the New Zealand grow guide, and the planting calendar.

Explore feminised seeds, high thc seeds, the New Zealand grow guide, and the planting calendar.

Growing in the named country

In New Zealand, outdoor planting generally begins during spring, from September to November, once local conditions are reliably warm. Granddaddy Purple is best matched with temperate or hot, dry settings. Regional differences matter: northern locations usually offer a longer warm season, while cooler or exposed areas may require extra shelter.

This is an intermediate-level option. Its dense flower structure rewards steady airflow, sensible spacing and close humidity monitoring. A sunny position, free-draining medium and protection from prolonged autumn rain can reduce risk from mould. Growers should always follow the rules that apply in their location.

Indoor

Indoor plants may reach up to 100 cm, making the cultivar manageable where vertical space is limited. A consistent light cycle and good air movement help maintain even growth. Selective training can open the canopy and improve light distribution, but heavy work late in flowering may place unnecessary stress on plants.

The flowering period is approximately 9–10 weeks. Indoor yields are listed at up to 500 g/m² under favourable conditions. This figure is a potential benchmark, not an assured result. Temperature, lighting, root space, nutrition and plant health all influence the final harvest.

Outdoor

Outdoors, Granddaddy Purple may grow to 180 cm and produce broad branching with substantial flowers. Plants benefit from strong daily sun, shelter from severe wind and enough room for airflow around the canopy. Support may be useful as flowers gain weight.

Potential outdoor yield is listed at up to 600 g per plant. Results depend on seasonal warmth, planting time, soil conditions, exposure and grower experience. Cooler districts may favour containers or protected positions that capture heat and allow plants to be moved during difficult weather.

Harvest

New Zealand outdoor harvest generally falls from March to May. Check flower maturity alongside the local forecast rather than relying on a calendar date alone. As autumn humidity rises, inspect dense flowers frequently and maintain airflow. At harvest, expect the cultivar’s favourite qualities to centre on ripe grape, berry sweetness and earthy depth, with pine and herbal accents varying between plants.