prvo, mislim da je za acoelorrhaphe wrightii potrebna toplija klima i nemože bit u "istoj kutiji" sa syagursom...
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Phoenix roebellenii je dosta nategnut za 3b zonu...
U 3a zoni nalaze se Copernicia baileyana, Copernicia fallense, Copernicia gigas zajedno sa Trachycarpus martianusom i kažu da trpe najmanje -4°C sa ponekim oštećenjima...
Zona 2a ili Queen zone bi trebala biti moja zona. Citat: Dypsis decipiens: adult palms are probably cold tolerant to around 20F/-6.66F, but seedlings most certainly are not (damaged from cold at 25F/-3.88C).

Citat: Livistona chinensis: ditto- some claim this is the most cold tolerant Livistona, but in Mediterranean climate so many seem equal

Ciatat: Phoenix reclinata: probably close to these other palms, but more adaptable in terms of growing back if froze badly.

Zanimljivo...idem još malo proučavati...