Cold hardiness & minimum temperature

Is Pecan 'Caddo' (Carya illinoinensis 'Caddo')cold hardy? Hardiness zone & min temp

Also called Caddo pecan, small-nut pecan.

More about pecan 'caddo'

About Pecan 'Caddo'

Carya illinoinensis 'Caddo' · also called Caddo pecan, small-nut pecan · edible

'Caddo' is a vigorous, precocious pecan producing small-to-medium nuts with high-quality, well-filled kernels and good scab resistance. Its early, heavy and consistent bearing and adaptability make it popular across both Western and Southeastern orchards. A Type I (protandrous) cultivar, it pollinates well with protogynous types such as 'Elliot'.

Cold limit: USDA 6-9 (broadly adaptable across the pecan belt) · RHS H5 (-15 to 38°C)

What pecan 'caddo''s hardiness rating actually means

Yes — pecan 'caddo' is genuinely cold hardy. Rated RHS H5 and USDA 6-9 (broadly adaptable across the pecan belt), it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H5 means: Hardy in most of the UK and in cold winters. On the US scale that maps to USDA 6-9 (broadly adaptable across the pecan belt) — the zones where it can be left outdoors year-round.

New to these scales? The USDA hardiness zone map explained covers how the zone numbers work, and you can find your own zone with the zone finder.

Minimum temperature — and what happens below it

Minimum survivable temperature is roughly about −15 to −10 °C. Pecan 'Caddo' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for pecan 'caddo' as it gets too cold:

It tolerates winter lows to about −15 to −10 °C once established.
Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root.
First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.

Can pecan 'caddo' go outside or overwinter — and where?

Plant it out within USDA 6-9 (broadly adaptable across the pecan belt) and it overwinters with little or no help.
It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy.
The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

Work back from your local frost dates with the frost-date calculator: the last spring frost and first autumn frost are what really decide when pecan 'caddo' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Pecan 'Caddo' hardiness — frequently asked questions

Is pecan 'caddo' cold hardy?

Yes — pecan 'caddo' is genuinely cold hardy. Rated RHS H5 and USDA 6-9 (broadly adaptable across the pecan belt), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Pecan 'Caddo' is hardy across USDA 6-9 (broadly adaptable across the pecan belt); it belongs in the ground or a frost-proof container, not on a windowsill, and many types actively need a cold winter to perform.

What is the minimum temperature pecan 'caddo' can survive?

Minimum survivable temperature is roughly about −15 to −10 °C. Pecan 'Caddo' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is pecan 'caddo'?

Pecan 'Caddo' is rated USDA 6-9 (broadly adaptable across the pecan belt) and RHS H5 — Hardy in most of the UK and in cold winters.

Can pecan 'caddo' survive winter outside?

Plant it out within USDA 6-9 (broadly adaptable across the pecan belt) and it overwinters with little or no help. It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy. The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

What happens to pecan 'caddo' below its minimum temperature?

It tolerates winter lows to about −15 to −10 °C once established. Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root. First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.