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I used bubble wrap followed over it with reflective insulation and piled mulch high. 1st a Marseilles Black VS Fig at my Mom’s then a Jujube ‘Honey Jar’ at my place.
This fig of hers had mold all over it. I told her to get some bleach and water and scrub it really well. The sun will do the rest. There was none dieback.
No dieback on my jujube.
For anyone not familiar with what’s going on with protecting woody plants that will hopefully stay woody in the landscape after several many (up to 5-years) of protection… we’re getting the bark thickened up literally so it has natural resilience to the cold.
Figs in colder climates what we’re trying to accomplish are plants that are root hardy. Sure enough you could continue to protect them above ground like I did, but ultimately 5-years down the road I’m wanting roots that will push up new growth every year where the crops will be borne. There are many methods to dealing with figs: container culture or in-ground. As the figs become large it’s very common step on them and smash them to the ground and hold them flat thru winter with organic debris mounded over them and over that reflective unsulation/tarps/boards or any material you see fit to provide insulation. Toss 1$ bags of potting media/compost over the insulation choice of yours to hold it down all winter.
I’m in zone 5b and it’s time for wrapped plants to get into the rhythms of weather. Bulbs are now up and that’s a pretty good indicator to unwrap your protected woody plants.