Forbidden Runtz was selected with one priority above all others: flavor. Growers Choice crossed Forbidden Fruit with Runtz and kept only the plants with the loudest, sweetest terpene profiles, creating a feminized, ultra-high-terpene hybrid that is 70% indica and 30% sativa.
Flavor did not come at the expense of strength. The breeder lists THC at 27–30% with medium CBD, and the indica dominance gives it a heavy finish. Being this fruity while still landing a hard punch is a rare combination, and it is what sets Forbidden Runtz apart.
In the grow room, plants show average vigor without excessive stretch, reaching 90–120 cm (35–47 in) indoors and 150–200 cm (59–79 in) outdoors. Flowering takes just 8 weeks, with indoor yields of 650–750 g/m² (2.1–2.5 oz/ft²). Outdoors, it is one of the quickest finishers around, with harvest in the last week of September.
Mold resistance is high, buds are rock-hard, and the plant handles warm and cold temperatures as well as both light and heavy feeding. That makes it forgiving for beginners and rewarding for experienced growers.
Flavor and Effects of Forbidden Runtz
Open a jar and the aroma is intensely sweet and fruity: tropical candy, ripe berries and a sugary Runtz-style sweetness, with the darker cherry and citrus tones of Forbidden Fruit underneath. Every grind releases a fresh cloud of fruit that fills the room.
The smoke is thick and strong, carrying that sweetness all the way through the exhale. It is like opening a bag of fruit candy in a hot car: rich, dense and impossible to ignore. Despite the sugary character, the smoke has real body, so it never feels thin or weak.
The 70% indica side defines the effect. Expect a heavy, knockout-style high that starts with a happy, euphoric lift and moves quickly into deep physical heaviness. At 27–30% THC, this one hits harder than most dessert strains.
Forbidden Runtz is suited to evening sessions and experienced consumers. Newer users will want to keep the first session small and let the full effect settle in.
Growing Forbidden Runtz Indoors and Outdoors
Indoors, Forbidden Runtz is an easy plant to manage. Its average growth and limited stretch keep the canopy tidy, and it adapts well to both low and high nutrient levels, so feeding mistakes are less likely to show. If you have headroom, Growers Choice suggests vegging a few extra days to reach the height you want before switching to 12/12.
Topping once or twice and spreading the branches with LST creates an even canopy of dense colas. The rock-hard buds benefit from good airflow, but high mold resistance means this strain is more forgiving than most in humid rooms.
Outdoors, plants reach 150–200 cm (59–79 in) and finish in the last week of September, which makes them a strong choice for regions with short summers or early autumn rain. They tolerate both warm and cold climates, so they suit a wide range of American growing regions.
For maximum terpene expression, keep late-bloom temperatures moderate and cure the flowers slowly for at least three weeks.
Forbidden Runtz Characteristics
| Strain type | Feminized |
| Genetics | Forbidden Fruit x Runtz |
| Indica/Sativa | 70% Indica / 30% Sativa |
| THC | 27–30% |
| CBD | Medium |
| Effect | Euphoric, heavy, knockout body finish |
| Flavor | Very sweet and fruity, strong smoke |
| Indoor yield | 650–750 g/m² (2.1–2.5 oz/ft²) |
| Flowering time | 8 weeks |
| Outdoor harvest | Last week of September |
| Height | Indoor: 90–120 cm (35–47 in); Outdoor: 150–200 cm (59–79 in) |
| Climate | Tolerates warm and cold climates |
| Mold resistance | High |
| Best cultivation technique | Topping and LST |
FAQ
What are the parents of Forbidden Runtz?
Forbidden Runtz is a cross of Forbidden Fruit and Runtz, selected by Growers Choice for maximum terpene content.
Is Forbidden Runtz indica or sativa?
It is indica-dominant, with 70% indica and 30% sativa genetics, which gives it a heavy, full-bodied finish.
How strong is Forbidden Runtz?
Growers Choice lists THC at 27–30% with medium CBD. It hits harder than most fruity strains.
Is Forbidden Runtz good for beginners?
Yes. It handles warm and cold temperatures, copes with low and high nutrient levels, does not stretch much and has high mold resistance.
How long does Forbidden Runtz take to flower?
Indoors it needs only 8 weeks of flowering. Outdoors in the Northern Hemisphere, it is ready in the last week of September.
How much does Forbidden Runtz yield?
Indoor growers can expect 650–750 g/m² (2.1–2.5 oz/ft²). Outdoor plants grow to 150–200 cm (59–79 in) and produce dense, rock-hard buds.

