Louis XIII OG is a feminized hybrid cannabis seed from Cali Connection that crosses a Louis XII OG Kush clone with Tahoe OG Kush. A 60% sativa / 40% indica lean, a 9-week flowering window, and buds so dense you'll need to stake them — that's the short version. The longer version involves sweet-sour lemon terps, pine undertones, and some of the most resinous flowers Cali Connection has put to seed.
Why Louis XIII OG from Cali Connection stands out
Cali Connection built their reputation on OG Kush phenotypes, and Louis XIII OG is one of their cleaner hybrid expressions. The parent stock — a cloned Louis XII OG Kush crossed with Tahoe OG Kush — gives you the terpene loudness of the Tahoe line with the structure and yield of the Louis XII cut. According to research on terpenoid chemotypes in cannabis (Elzinga et al., 2017), OG Kush lineages cluster in the limonene/myrcene-dominant group at roughly a 1:1 ratio, which maps directly onto what this strain smells and tastes like: lemon zest up front, a resinous pine backbone, and a sweet-sour exhale.
This is a vigorous plant. The buds get heavy enough that the branches need staking in weeks 6–9 — not a flaw, just a reality of how much weight these colas put on. If you've grown lanky OG cuts before and watched them collapse under their own flowers, you know the drill.
Louis XIII OG genetics and grow specs at a glance
The quick reference below covers what most growers want to know before germinating.
| Spec | Value |
|---|---|
| Breeder | Cali Connection |
| Genetics | Louis XII OG Kush (clone) × Tahoe OG Kush |
| Type | Feminized, photoperiod |
| Sativa/Indica | 60% sativa / 40% indica |
| Flowering time | ~9 weeks |
| Dominant terpenes | Limonene, myrcene, pinene |
| Flavour profile | Sweet-sour lemon, pine undertones |
| Seeds per pack | 6 (SKU: CSCA0022) |
| Training recommended | Staking in late flower |
Flavour, aroma and terpene profile
Louis XIII OG leads with a sweet-sour citrus nose and a pine finish that sticks around. The dominant terpenes follow the classic OG Kush pattern — limonene and myrcene doing most of the heavy lifting, with pinene giving it that sharp resinous edge. Research on cannabis essential oils has measured myrcene at around 22.9% in some Cannabis sativa extracts (Surendran et al., 2021), and you can smell it in the jar — that slightly earthy, fruity undertone beneath the lemon.
If you've grown Tahoe OG or any of the Louis XII phenos, the aroma won't surprise you. What might surprise you is how loud it gets in late flower. This one needs a carbon filter if you're growing indoors — the smell carries.
How to grow Louis XIII OG feminized seeds
Flowering finishes in about 9 weeks, which is short for an OG Kush hybrid. Yields are generous in both quantity and resin production. The plant responds well to topping and LST, and given how heavy the buds get, some form of support structure is not optional — it's the difference between a clean harvest and picking snapped branches off your floor.
- Germinate seeds in purified, room-temperature water with pH around 5.5–6.5. Keep the germination area at 21–32°C (70–90°F).
- Transfer to a light, well-draining medium once the taproot is 1–2 cm.
- Veg for 4–6 weeks depending on your space. Top once or twice for an even canopy.
- Switch to 12/12. Expect a moderate stretch in the first 2–3 weeks of flower.
- Install stakes or a ScrOG net by week 4 — the colas will thank you later.
- Flush in the final 10–14 days. Harvest around day 63 when trichomes are mostly cloudy with some amber.
Who Louis XIII OG is best for
This is best for growers who want a 9-week OG Kush hybrid with serious terpene output and don't mind staking their plants. It's not a stealth grow — the aroma is loud — and it's not the lowest-maintenance seed in the Cali Connection catalogue. But if you want an OG phenotype with citrus-forward flavour and dense, resinous buds in under two months of flower, Louis XIII OG earns its keep.
If you're newer to growing OG lines, start with one seed from the 6-pack and learn her habits before committing the whole batch. Cali Connection genetics can show some phenotype variation, which is normal for Kush hybrids and documented in SNP analysis of cannabis clonal lines (Vergara et al., 2021).
Pairs well with a decent set of bamboo stakes or a ScrOG net — you'll need the support by week 5. A carbon filter is also worth the setup; Louis XIII OG is not a shy-smelling strain. If you like this lineage, Cali Connection's Chem Valley Kush and Lemon Tart are in the same flavour family.
Honest limitations
A few things worth knowing before you germinate. The buds get dense enough that humidity control in late flower matters — keep RH below 50% in weeks 7–9 or you risk bud rot in the thickest colas. The aroma is strong, so indoor grows without a carbon filter will advertise themselves. And as a 60/40 sativa-leaning hybrid, the stretch in early flower is real — don't flip to 12/12 until you've got vertical headroom to spare.
This guide is written for adults. Cannabis cultivation, possession, and use are age-restricted activities; the information here applies to adult growers and is not appropriate for people under 18.
Frequently Asked Questions
Is Louis XIII OG sativa or indica dominant?
Louis XIII OG is sativa-dominant at 60% sativa / 40% indica. Despite the sativa lean, the OG Kush parentage gives it a heavier body feel than most sativa hybrids, with the Tahoe OG contributing resin and density.
How long does Louis XIII OG take to flower?
About 9 weeks indoors under 12/12. That's short for an OG Kush hybrid — most finish at 10–11 weeks. Outdoor harvest in the northern hemisphere lands in early to mid-October.
Does Louis XIII OG need plant support?
Yes. The buds get heavy enough that branches can snap in the final weeks of flower. Stake the main colas by week 4–5, or run a ScrOG net to spread the weight across the canopy.
What does Louis XIII OG taste like?
Sweet-sour lemon with pine undertones and a resinous Kush backbone. Research on OG Kush chemotypes (Elzinga et al., 2017) places this lineage in the limonene/myrcene-dominant group, which matches the citrus-forward flavour profile.
How many seeds come in a pack?
Six feminized seeds per pack (SKU CSCA0022). Feminized means you won't get male plants — every seed that germinates will flower as female.
Is Louis XIII OG good for beginners?
It's a moderate grow. The 9-week flowering time is forgiving, but the heavy buds need staking and the late-flower humidity needs managing. If you've grown one photoperiod strain before, you'll handle this one fine.
Last updated: April 2026
