Hey there, I wanted to share some thoughts about mulberries for a temperate climate. While no single species is a perfect match for your conditions, there are some options worth considering.
Late Frost-Resistant Mulberry
One of the most frost-resistant mulberries is Morus nigra. It buds late, making it less vulnerable to frost damage. It’s a slow grower, but its fruit is known for its excellent flavor and good size. The berries are quite delicate, and their short stems make harvesting a bit tricky without causing damage.
Ukrainian Selections of Morus alba
Some Morus alba selections from Ukraine handle frost better than most cultivars. However, while the wood may survive late frosts, the flowers can still be affected. These selections tend to have larger fruit, and notable varieties include:
- Black Prince
- Galicia
- Black Princessa
- Shelli 150
The flavor is pleasant, though M. alba fruit is typically sweet and mild, with less acidity than other species.
Firmer-Fruited Mulberries
If firmer fruit is a priority, varieties in the M. alba or M. latifolia group might be good options, such as:
- Agathe
- Bella Goja
- Black Italian
Market Fruit Options
For commercial growing, Morus macroura and M. wittorium are excellent in terms of fruit quality. However, they tend to bud early, which makes them more vulnerable to late frosts. If you have a greenhouse or tunnel, they could still be worth trying. A Belgian breeder has also developed M. alba x M. macroura hybrids (I believe them to be called Klon 10 & Klon 11), which might be another possibility despite their early budding.
Best Choice for a U-Pick Farm
For a U-pick farm, M. alba x M. rubra hybrids are a great choice. These hybrids adapt well to different climates and tend to bud later than pure M. alba. Plus, they produce fruit for up to three months, much longer than M. alba. Their flavor is also more complex. Some cultivars I would recommend:
- Illinois Everbearing
- Gerardi Dwarf (the only true dwarf mulberry, very prolific)
- Collier
- Wellington
- Capsrum
- Tom’s (and others)
Rootstock Considerations
- M. alba rootstock is better suited for drought conditions.
- M. rubra-influenced rootstock is a good choice for wetter locations.
I hope this information is helpful!