Citrus > Cold Hardy Citrus

F2 citrange winter hardiness trial

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Various selections exhibiting a percentage of Zygotic seedlings:

The crooked stems are caused by growing up against the plastic cover.

So many, holy cow!

An update on the Winter survival of various selections. In most of the cases Deciduous selections have a better appearance than Evergreen ones.

Segentrange 128 shows excellent hardiness having been unprotected outdoors for nearly 6 years. It hasn't fruited yet.

Segentrange D has been outdoors for the past several years and hasn't fruited to this point.

Conestoga 001 is quite hardy, but reluctantly deciduous. It hasn't fruited yet.

Conestoga 010 is fully deciduous and has fruited. It produces a mixture of zygotic and nucellar seedlings.

Bishop seedlings exhibiting variation in cold resistance.

Poncirus Plus hasn't shown any cold damage.

Conestoga 006 has fruited and shows good cold hardiness. It's seedlings are a mixture of zygotic and nucellar plants.

Conestoga 011 is tetraploid and hasn't fruited yet. It's among the hardiest selections.

Conestoga 067 shows hardiness very similar to Bishop Citrandarin. It produces mixed leaf types including monofoliate.


1279 Citrandarin flower buds.

Conestoga 010 flower buds

Poncirus Plus flowers

Conestoga 128 flower buds - this tree has never been protected and these are it's first flowers.

5* Citrumelo high grafted on Poncirus shows little damage
after a mild Winter with a low of 6F.


Tetraploid Conestoga 011 Segentrange has developed flower buds at 6 years of age.


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