Damage from a friday night (temperature just below 20f, with no prior killing frosts) is becoming apparent.
Brown leaf scars from enzymes released due to cell bursting:
Unprotected, vigorous tree in the open, leaves are hard to pull off, a layer of the petiole remains attached.
Under 2 layers of row cover ~4ft. high, minor damage, leaves are 90% detached, clean leaf scar.
Soft green tips with tan blisters, floppy leaf petioles. Vigorous, unprotected tree in the open.
Oozing lenticels… Unprotected tree in the open.
4 YO tree with moderate growth in a sheltered location, trained next to a wall. No damage, green leaf and fruit scars, petioles still firm.
2nd year seedlings bent down to 2-4 ft. under 3 layers of row cover, minor leaf damage.
Seedling left unprotected, minor damage, dropped leaves naturally, no explanation for how this one did so well…
3rd year trees bent over to 2 ft,. covered with one layer of black ground cover, spotty damage, most leaf petioles are still firm near the stems.
3rd year vigorous trees under 3 layers of row cover, about 4-6 ft. tall, leaf petioles are still firm, figs still edible.
Slow growing 2nd year trunk, unprotected and exposed… vigorous watersprout shows oozing lenticels.
Vigorous trees in compost socks that were laid on their sides and covered with one layer of black ground cover, less than a foot high, no damage.
More trees in compost socks, one layer of ground cover and one layer of row cover.
Glad I hustled around to get some covered, it is uncertain whether the damages growths will be able to survive winter, even with protection they may rot or dry out.