Bubblegum XL
Cannabis seeds
by Royal Queen Seeds
Bubblegum XL Cannabis Seeds by Royal Queen Seeds
Bubblegum XL is a feminised cannabis seed from Royal Queen Seeds that delivers sweet, candy-like buds with a solid 19% THC level and yields up to 500g/m² indoors. Born from a cross of Power Plant and Santa Maria, this 60% sativa / 40% indica hybrid finishes flowering in just 8-9 weeks — fast for a sativa-leaning plant — and stays compact enough for indoor setups without losing any of that dense, resinous bud structure that makes the Bubblegum line so popular.
Pack Sizes
Bubblegum XL seeds come in packs of 1, 3, 5, or 10. If you're running a single tent, 3 seeds gives you a comfortable selection for pheno-hunting without overcommitting. Growing outdoors with space to fill? The 10-pack is the better shout — you'll want several plants to maximise that 400-450g per-plant outdoor potential.
Why Grow Bubblegum XL Seeds
We get asked a lot about strains that balance flavour with actual performance numbers. Bubblegum XL sits right in that sweet spot. The genetics come from two proven workhorses: Power Plant, which brings vigour and yield, and Santa Maria, which contributes the sweet, bubblegum terpene profile and sativa-leaning effects. The result is a plant that doesn't ask much from you but gives back generously.
Indoors, Bubblegum XL stays between 80 and 140cm — manageable in a standard grow tent without aggressive training, though she responds well to topping and LST if you want to keep her even shorter. The 8-9 week flowering window is genuinely quick for a 60% sativa hybrid. Most sativa-dominant plants push 10-12 weeks, so shaving those extra weeks off your cycle means faster turnarounds and lower electricity bills. The buds come out dense, coated in resin, and absolutely reeking of sweet bubblegum. Crack a jar after curing and the room smells like a sweet shop. That's not marketing — that's the terpene profile doing its thing.
Outdoors, she stretches toward 200cm and delivers 400-450 grams per plant by harvest in October. One honest limitation: if you're in a wet climate — the UK, northern Germany, the Netherlands in a bad autumn — watch for bud rot and mould on those dense colas. The bud density that makes Bubblegum XL so satisfying to trim is the same thing that traps moisture. Keep airflow moving, and if you can, harvest before the heaviest autumn rains hit.
Compared to something like Royal Queen Seeds' Critical, which leans more indica and finishes a touch faster, Bubblegum XL gives you a more uplifting, sativa-influenced effect alongside that candy sweetness. Critical is the better choice if pure yield-per-day-of-flowering is your only metric, but Bubblegum XL wins on flavour and effect complexity. We'd pick Bubblegum XL for a personal stash grow where taste matters.
Bubblegum XL Strain Specifications
| Specification | Detail |
|---|---|
| Seed Bank | Royal Queen Seeds |
| Genetics | Power Plant x Santa Maria |
| Type | Feminised photoperiod |
| Sativa / Indica | 60% Sativa / 40% Indica |
| THC | 19% |
| CBD | Medium |
| Flowering Time | 8-9 weeks |
| Indoor Height | 80-140cm |
| Outdoor Height | Up to 200cm |
| Indoor Yield | 450-500g/m² |
| Outdoor Yield | 400-450g per plant |
| Harvest Month (Outdoor) | October |
| Available Packs | 1, 3, 5, or 10 seeds |
Bubblegum XL Terpene Profile and Aroma
The name isn't just branding — Bubblegum XL genuinely smells and tastes like sweet bubblegum. Break a cured bud apart and you get that unmistakable sugary, candy-like sweetness with a slightly floral undertone. The smoke is smooth, sweet on the inhale, and leaves a pleasant aftertaste that lingers. If you've ever grown a Bubblegum-lineage strain before, this is that same recognisable profile dialled up by the Santa Maria parentage.
According to a review in the Journal of Cannabis Research, while the ethanolic extract of cannabis flowers shows notable bioactivity, this effect was not attributed to any of the five most abundant terpenes individually, suggesting the full terpene-cannabinoid combination matters more than any single compound (Nahler et al., 2021, PMC8489319). In plain terms: the complete terpene profile of Bubblegum XL — not just the THC — contributes to the overall character of the final product. That resinous coating on the buds isn't just for show.
How to Grow Bubblegum XL Cannabis Seeds
- Germinate your Bubblegum XL seeds using the paper towel method or directly in a starter plug. Keep temperatures between 22-25°C and expect taproots within 24-72 hours.
- Transplant seedlings into their final containers once the first true leaves appear. A 11-15 litre pot works well for indoor grows. Bubblegum XL isn't fussy about medium — soil, coco, or hydro all work.
- During vegetative growth, consider topping once above the 4th or 5th node. Bubblegum XL responds well to low-stress training (LST) to open up the canopy and expose lower bud sites to light. This is especially worthwhile indoors where you want to keep her under 120cm.
- Switch to a 12/12 light cycle to trigger flowering. The 8-9 week flowering window starts from the flip, not from when you first see pistils. Feed a bloom-specific nutrient schedule and keep relative humidity below 50% during late flower to protect those dense buds.
- Monitor trichome development with a jeweller's loupe from week 7 onwards. Harvest when trichomes shift from clear to mostly cloudy with a few amber heads for the best balance of potency and flavour.
- Dry in a dark room at 18-20°C and 55-60% humidity for 10-14 days, then cure in glass jars for at least two weeks. The bubblegum sweetness intensifies significantly with a proper cure — rushing this step is the single biggest mistake we see growers make with flavour-forward strains.
Running Bubblegum XL indoors? Pair her with a complete grow tent kit to get your environment dialled in from day one. A carbon filter is non-negotiable once she starts flowering — the sweet terpene output is lovely in a jar, less lovely when your neighbours can smell it. If you're after another Royal Queen Seeds strain with a similar sweet profile but faster finish, have a look at Blue Mystic.
Bubblegum XL Growing Tips
We've been selling cannabis seeds since 1999, and Bubblegum XL is one of those strains that keeps coming back in conversations with returning customers. The most common feedback we hear: the yields are genuinely as advertised. Hitting 450-500g/m² indoors isn't aspirational marketing — it's realistic with decent lighting and a proper feed schedule. A few growers have reported even higher numbers under optimised LED setups with CO2 supplementation.
The one thing to watch: those dense, chunky buds can develop mould if humidity creeps up during the final weeks of flowering. This is more of a concern outdoors in northern European climates, but even indoor growers should keep a dehumidifier running and maintain good airflow through the canopy. If you're growing in a tent, a small oscillating fan pointed at the canopy makes a real difference. We've seen growers lose entire colas in the last week before harvest because they skimped on air circulation. Don't be that grower.
The 19% THC level puts Bubblegum XL in a comfortable middle ground — strong enough to be satisfying, not so overwhelming that casual smokers need to tread carefully. The medium CBD content adds a touch of balance to the effect. It's a strain you can enjoy in the evening without being completely written off for the rest of the night.
Frequently Asked Questions
What training techniques work best for Bubblegum XL?
Topping once above the 4th or 5th node combined with low-stress training (LST) gives the best results. Bubblegum XL's natural structure responds well to an open canopy, which also helps prevent moisture buildup in those dense colas during late flower.
How does Bubblegum XL compare to the original Bubblegum strain?
Bubblegum XL is Royal Queen Seeds' take on the classic, crossing Power Plant with Santa Maria rather than using the original Indiana Bubblegum genetics directly. The result is higher yields (450-500g/m² vs. typically 350-400g/m² for classic Bubblegum cuts) and a more sativa-leaning effect, while keeping that signature sweet candy aroma.
Is Bubblegum XL suitable for beginner growers?
Yes. She stays compact indoors (80-140cm), finishes in 8-9 weeks, and doesn't demand advanced feeding schedules. The main thing to manage is humidity during late flowering to prevent mould on the dense buds. Keep airflow strong and humidity below 50% in the last two weeks.
What yield can I realistically expect from Bubblegum XL outdoors?
In a decent European summer with full sun, expect 400-450 grams per plant by October harvest. Plants reach up to 200cm outdoors. In wetter climates, harvest slightly early if rain is forecast — the dense bud structure makes her susceptible to rot in prolonged damp conditions.
Does Bubblegum XL really smell like bubblegum?
Genuinely, yes. The terpene profile inherited from the Santa Maria parent produces a distinctly sweet, candy-like aroma that intensifies during the cure. It's one of the most recognisably sweet-smelling strains we carry. A carbon filter during flowering is strongly recommended for indoor grows.
How long should I cure Bubblegum XL buds?
Minimum two weeks in sealed glass jars, burping daily for the first week. The bubblegum sweetness develops significantly between weeks two and four of curing. Rushing the cure is the fastest way to lose the flavour that makes this strain special.
Can I grow Bubblegum XL in a small tent?
Absolutely. At 80-140cm indoors, she fits comfortably in a 60x60cm tent with training, or you can run 4 plants in an 80x80cm or 100x100cm tent for a proper SOG or SCROG setup. The manageable height is one of her strongest selling points for indoor growers with limited space.
Last updated: April 2026
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Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.