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Watermelon Jam Feminized Seeds

Rated 5.00 out of 5 based on 4 customer ratings

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Watermelon Jam is a Indica-heavy cannabis connoisseur favorite with a wonderfully fruity terpene profile, strong THC, heavy yielder that is also beginner grower friendly. The origin story is somewhat elusive with it’s lineage tracing back to selected Watermelon genetics. Developed in Europe around 2010, Watermelon Jam is all about taking everything growers and consumers loved (flavour, potency, yield) and turning the dial up a few notches.

Suitable for indoor or outdoor growing, it enjoys semi-humid environments. Yielding up to 950 g/m2 under optimal conditions, this strain has strong lateral branches and is definitely a heavy yielder. This exotic strain will not disappoint for those who like a uniquely fruity, heavy hitting Indica.

80% INDICA – 20% SATIVA

FEMINIZED & TOP QUALITY

VERY HIGH THC LEVEL 20-26%

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Price range: $75.00 through $225.00

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Strain Overview - Watermelon Jam

Like a perfectly ripe slice of watermelon… but with a THC kick that gently convinces you the couch is your true home

THC Levels (max up to)

12 %

Genetics: Watermelon Kush x Unknown Berry Strain (likely OG Kush origin)
Strain Type: Hybrid
Dominance: ~80% Indica / 20% Sativa
THC: Typically 20–26% (Plenty of kick)
CBD Content: Minimal, usually below 1%
Yield (Indoor): Up to ~950g/m² in optimal setups
Yield (Outdoor): Up to ~1800g per plant in ideal conditions
Height: Medium to tall with strong branching
Flowering Period: Around 7-8 weeks
Flavour Profile: Sweet Fruity watermelon flavour

Watermelon Jam History & Genetics

Watermelon Jam is a modern fruit-forward hybrid bred to combine exceptional resin production with an unmistakably sweet melon aroma. While individual breeders may work with slightly different selections, Watermelon Jam is generally recognised for producing vigorous plants with dense, resin-coated flowers, excellent bag appeal and a terpene profile dominated by sweet tropical fruit and fresh watermelon notes.

The strain has become increasingly popular among home growers because it combines premium modern genetics with reliable growth characteristics. Strong branching, heavy flower formation and excellent trichome production make Watermelon Jam an attractive choice for cultivators seeking both visual appeal and impressive harvests.

Watermelon Jam is one of those strains that keeps a bit of mystery. Its lineage traces back to selected Watermelon genetics which likely has orgins in OG Kush x with an unknown berry strain. Watermelon is known for it’s fruity terpene profile and indica-heavy structure. Watermelon Jam is basically Watermelon Kush, just taken up a few notches with enhanced potency and yielding capability. Since its introduction in the early 2010s, it’s carved out a reputation as a reliable, high-yielding strain with a standout flavour profile.

Effects

Physical relaxation and tension relief
Sedative qualities (ideal for evening use)
Appetite stimulation (hide the snacks or embrace the chaos)
Mild mood uplift without excessive cerebral stimulation

As a heavy hitting Indica Dominant Strain, this is a great medicinal or night time strain for deep relaxation. Watermelon Jam leans hard into its indica roots, delivering a deeply calming, body-heavy experience. The high typically starts with a gentle mental ease—nothing too spacey—before sliding into a full-body relaxation that feels like your muscles just clocked off work early. It’s the kind of strain that politely suggests, “maybe cancel your plans and sit down for a bit.”

Its THC range (20–26%) this sits within our Highest THC strain list and gives it enough punch to satisfy experienced users, while still being manageable for those who respect dosage.

Taste, Aroma & Tarpene Profile

Myrcene – contributes to the relaxing, sedative effects
Limonene – adds brightness and subtle citrus lift
Caryophyllene – introduces a faint spice and depth

Watermelon Jam is defined by its sweet, juicy, fruit-forward terpene profile, strongly reminiscent of fresh watermelon with subtle candy-like undertones. The result is a strain that smells like summer and tastes like someone turned a fruit salad into a dessert.

Growing Watermelon Jam

Indoor: Flowering time: ~7–8 weeks | Yield: up to 950 g/m² under optimal conditions
Outdoor: Yield: ~500 g per plant or more | Prefers semi-humid climates with temps around 20–2
Structure: Bushy, medium height with strong lateral branching

Watermelon Jam develops an impressive blanket of trichomes during late flowering. Resin production continues increasing right through the final weeks, rewarding growers who allow the flowers to fully mature before harvest.

Watermelon Jam is a grower-friendly strain for indoor or outdoors and rewards a bit of attention with serious returns.
-Responds well to LST (Low Stress Training) to maximise canopy efficiency
-Keep humidity controlled during flowering to protect dense buds
-Strong nutrient uptake—don’t starve it, but avoid overfeeding
-Good airflow is key due to its bushy structure
-Performs well in both soil and hydro setups

-Strengths: Very high yield potential, fast flowering time, strong flavour profile, reliable growth patterns
-Weaknesses: Dense buds can be prone to mould in poor conditions, potency may be heavy for beginners if not moderated

Harvest Tips

Many growers find Watermelon Jam reaches its full flavour potential when harvested after most pistils have darkened and trichomes become predominantly cloudy with a small percentage turning amber. A slow dry followed by a proper cure helps preserve the strain’s signature sweet watermelon aroma and improves overall smoothness.

Final Thoughts

Watermelon Jam is an exotic, but it’s not wanky. It’s the one that quietly wins everyone over without a heap of fan fare. Big yields, strong effects, and a flavour profile that practically screams summer make it a reliable favourite for growers and consumers alike. This one is for those who like a good THC kick up the bum…. and then a lie down.

FAQ - Watermelon Jam Strain

Is Watermelon Jam indica or sativa?

It’s predominantly indica (around 80%), so expect relaxing, body-focused effects.

How strong is Watermelon Jam?

THC typically ranges from 20–26%, making it a very potent strain.

What does Watermelon Jam taste like?

Sweet, fruity, and very close to fresh watermelon—no imagination required.

How long does it take to flower?

This strain has a fast flowing time of around 7–8 weeks indoors, which is faster than most other strains and it is also fast growing/high yielding.

Is it good for beginners?

Yes for growing (it’s actually fairly forgiving), but beginners should be cautious with dosage due to potency. Make sure to follow the germination guide to ensure proper germination

What yields can I expect?

Up to 950 g/m² indoors and around 500 g per plant outdoors in good conditions.

Does it grow well outdoors in Australia?

Yes—especially in warm, semi-humid regions with stable temperatures.

What growing techniques work best?

Low Stress Training (LST) and canopy management help maximise yield.

Is the genetics stable?

Yes, it’s been bred for consistency, though like all cannabis, minor phenotype variation can occur.

What Strains is Watermelon Jam Similar to?

As a fruity & sweet strain, other CG strains hat are similar include Gelato, Runtz Gluntz & Girl Scout Cookies

Disclaimer

Cannabis seeds are sold as souvenirs for body care, genetic preservation or collective purposes only unless your local laws permit germination and cultivation. Users of this website are aware that some information, products and services of this website may be prohibited by law in some states of Australia. As such, our customers are obliged to inform themselves and comply with the laws in their state. CG Australia cannot be held responsible for any illegal activity conducted by it’s customers. We reserve the right to refuse the purchase or cancel the order if any actions from customers are to the contrary of this disclaimer.

*We gaurantee your seeds will be delivered. We’ll use the tracking to determine this, so you must keep a close eye on the tracking once it’s despatched to ensure successful delivery. We normally provide the tracking code via email 1 day after payment is confirmed.
**All seeds are fresh, top quality & as described and suitable as souvenirs /collectable purposes only. We do not support any customers acting in conflict with their local state laws.

SKU: WJ Categories: Cannabis Seeds, Exotic Strains, Free Seeds Promo, Highest THC, Indica Dominant, NEW, Photo Period

Number of Seeds	5 + 1 Seeds (6 total), 10 + 2 Seeds (12 total), 20 + 5 Seeds (25 total)

Based on 4 reviews

5.0 overall