Superhot Pepper (Ghost, Reaper, Scorpion) in Zone 4a & 4b

Capsicum chinense

When to plant superhot pepper (ghost, reaper, scorpion) in zone 4b

Zones 4a and 4b share the same average frost dates in our data, so this page covers both.

Method: Start indoors: Start indoors from seed, then transplant outside. Superhot Pepper (Ghost, Reaper, Scorpion) needs a head start most zones can't give it by direct-sowing alone.

Start indoors	Feb 27–Mar 6
Direct sow / transplant outside	May 29–Jun 5
Estimated harvest	Oct 11–Oct 18 (~135 days after transplanting)

Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 2-3 ft.

Superhot peppers (Ghost, Reaper, Scorpion, and their relatives) are a different commitment than a standard pepper plant. Days to maturity commonly runs 120-150+ days versus roughly 75-100 for a regular hot pepper, and germination itself is slower and far less consistent, sometimes taking 2-6 weeks instead of the usual week or so. Start these far earlier than you'd think to.

How superhot pepper (ghost, reaper, scorpion) fits zone 4's season

Zone 4b's frost-free window runs about 128 days, from May 15 to September 20. Superhot Pepper (Ghost, Reaper, Scorpion) needs about 135 days from transplant to first harvest.

Good companions

Basil: Reputed to repel aphids and improve pepper growth nearby, but a controlled garden trial testing this same claim on a related crop found no pest-reduction benefit from basil, and actually found higher pest counts on the basil-companioned plants — treat this pairing as unproven, not as a working pest deterrent.
Onion: Reputed to deter many common pepper pests, though this specific pairing hasn't been tested the way onion/carrot pest-masking has — treat it as garden tradition.

Where to buy superhot pepper seeds

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