Filius Blue Pepper

A compact Mexican heirloom chili pepper (Capsicum annuum) known for its striking purple-blue fruits that ripen to vibrant red. It offers cayenne-level heat that is strongest in the unripe stage and is well-suited to container growing and edible landscaping.

Growing

~85 days to maturity

Fruit size

1.3–2.5 cm

Flavor & Use

Straightforward and peppery with bell-pepper-like qualities that are not overly complex; sweetens and heat diminishes as fruits mature from purple-blue to red.

Straightforward peppery with neutral to mildly sweet notes that develop upon ripening

Culinary

Salsashot saucesfresh in salads and sandwiches (especially riper milder fruits)drying into flakes or powderinfusing oilsalso excellent for ornamental edible landscaping and container displays.

About

Filius Blue is a small, bushy Capsicum annuum plant typically reaching 20–60 cm in height with attractive foliage often showing purple or blue tinges. It produces heavy yields of small ovoid to conical fruits about 1.3–2.5 cm long that start deep indigo, violet-blue, or purplish (sometimes nearly black) and ripen through orange to a fiery red. The taste is straightforward and peppery with mild bell-pepper notes. It is fully edible and used in salsas, sauces, fresh dishes, and drying, though it is also prized as a colorful ornamental for pots, patios, and small gardens. It holds the Royal Horticultural Society Award of Garden Merit.

Backstory

Heirloom variety originating in Mexico, valued for its unique fruit coloration starting in shades of blue-purple rather than green and its rare decreasing heat profile with ripeness. Popularized in seed catalogs for both ornamental and culinary use in small spaces. Has received the Royal Horticultural Society Award of Garden Merit.

Appearance

ShapeOvoid-conical
ColorPurple · Blue · Indigo · Orange · Red
Size1.3–2.5 cm
WallThin
SkinSmooth

Growing

SunFull
WaterModerate
ClimateSubtropical
Days to maturity85 days
Plant height20–60 cm
Soil pH6–7
Germination10–14 days
Spacing40 cm
HardinessZones 9-11

Heritage

Explore

We don't have a documented family for this pepper yet.

Sources

FAQ

How hot is Filius Blue Pepper?
Capsi’s sourced range is 20,000 SHU (Official breeder). Capsi uses a sourced range and a trust tier, not a single marketing number. How we verify heat: https://web.thecapsi.app/learn/heat-and-capsaicin/how-we-measure-heat
What does Filius Blue Pepper taste like?
Straightforward and peppery with bell-pepper-like qualities that are not overly complex; sweetens and heat diminishes as fruits mature from purple-blue to red.
How do I grow Filius Blue Pepper?
Filius Blue Pepper: about 85 days to maturity, subtropical climate, full sun, hardiness zones 9-11.
What can I substitute for Filius Blue Pepper?
Capsi does not have that recorded yet.