C4 IBL by East Coast Seeds
A indica-leaning cross of C4 × C4, C4 IBL — released by East Coast Seeds — shows up in a lot of tents for good reason. Indoors it typically finishes flowering in around 50 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real C4 IBL grows against.
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Similar strains
| Breeder | East Coast Seeds |
|---|---|
| Type | 55% Indica / 45% Sativa |
| Flowering time | ±50 days |
| Environment | Outdoors, Greenhouse |
| Lineage | C4 × C4 |
| Descendants | Cosmic Haze, Sour Grape, MM7 |
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Growing C4 IBL: what to expect
As an indica-leaning plant, expect a modest stretch after the flip (roughly 50–100%) and dense bud structure — which makes late-flower humidity discipline the main risk: keep RH in the 40s once buds fatten to stay ahead of mold. Growers familiar with C4 or C4 will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.
C4 IBL FAQ
How long does C4 IBL take to flower?
C4 IBL typically flowers in around 50 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is C4 IBL an indica or a sativa?
C4 IBL is listed as 55% Indica / 45% Sativa.
What are the parents of C4 IBL?
C4 IBL was bred from C4 × C4 by East Coast Seeds.
What environment does C4 IBL like?
Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.
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Facts compiled from public breeder listings. Growing C4 IBL? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
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