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Tested in Bulgaria to minus 16 C.I have 2 seedlings wich i plan to plant them outdoor in zone 6 .Good advice about planting them deep and to clean them of snow.
I think the snow kills them because they are evergreen.Cant make photosinthesis.My seedlings grow quite fast.They are.just 6 months old from seed and one is @ 45 cm tall.
Quote from: SeaWalnut on July 30, 2019, 11:07:59 AMI think the snow kills them because they are evergreen.Cant make photosinthesis.My seedlings grow quite fast.They are.just 6 months old from seed and one is @ 45 cm tall. A few months without photosynthesis shouldn't be a problem. Near the coast in Holland (zone 8b) they drop their leaves in winter. So there is no photosynthesis going on for many months. In spring the leaves return and by summer they are looking healthy (see pic below from a few weeks ago). So in cold winters they act deciduous, but can thrive nonetheless. The minimum temperatures in zone 6 would make me worry a lot more, unless they are in that geodesic greenhouse
Im in zone 6 but i have a tall hill on the north side and my house is facing south on top of a smaller hill.That creates a microclimate like 7 from the original 6 and near the house its probably zone 8.But you are right,i will keep the feijoas in the dome when the serious freezing starts.I only have 2 plants and if one dies from the cold then the otther will not set fruit even if it survives.Outdoor i will try to plant Ugni Molinae.Its more cold hardy than feijoa and propagates easily from cuttings.