Hardy citrus trees for zones 6 and 7.

[Tim DH]

Thanks Paul,
     That's an interesting list.

     The stand out cultivar is Prague Chimera. ... Shame that (being a chimera) it is a dead end where breeding is concerned!

     The missing data, from my perspective, is fruiting season. It doesn't matter how hardy a thing is, up here, we are not going to be able to ripen anything in December/January/February. There just isn't the light to do it.

Tim DH

[Tim DH]

Hi Emily,
     Following on from your query about 'Tough Citrus' seeds, I've just stumbled across a review on the Tropical Fruit Forum, which reckons that of the C series C57 is most palatable. (Elsewhere on the same thread X639 is reported as tasting very bad!)
     My understanding is that these varieties are commercial rootstock seeds. Check out Lyn Citrus Seeds.

Tim DH

[Tim DH]

Candlemass has just passed, so here is an (annual) update on my Yuzu seedlings.

Most of them are currently over-wintering quite happily in an unheated greenhouse. There is a fair bit of variety in the seedlings, so I'm hopeful that that indicates some genetic variability. The main stems are up to a centimetre in diameter.

In a month or so, I intend to plant the bigger seedlings out in a hedge, along with some Sudachi seedlings. As far as I'm aware, our last serious cold snap was an episode of Minus 10^oC about fifteen years ago. Tho' I expect cold wind to be more of a problem than just cold.

I fancy starting another batch of Yuzu seedlings this Autumn, but instead of the Sudachi, I'll try to get some early ripening Mikan/Satsuma/Mandarin.

Tim DH

[Tim DH]

Seven Citrus planted in the hedge!
Four Yuzus spaced out alternately with three Sudachi.

We had a couple of nice days and I got worried that the plants in the greenhouse might be encouraged by the warmth to put out some soft growth, SO out they went.

Last Millennium, when time off work had to be booked months in advance, the second half of February was the most reliable time to plan a mountain trip with ice axe. We did have a little flurry of snow this morning, but it came to nothing.

Outdoor citrus in Yorkshire is a rare sight (I've never seen it before) so who knows how long this spectacle will last!

[Diane Whitehead]

We are milder than zones 6 and 7, but have cool summers.  There is a nursery near me that grows citrus outside.

They have a YouTube channel and have made a number of programs:

Videos

Visit our YouTube channel at https://www.youtube.com/channel/UCWLqGxPE4BbcASnpImGuFZA.

The videos are also listed here:

Productive Fig Varieties for South Coastal British Columbia - San Antonio and Gentile Bianca (26 November, 2025): https://www.youtube.com/watch?v=dlY2RUq00wI
Establishing and Protecting Lemons and Limes Outdoors in South Coastal British Columbia (25 November, 2025): https://www.youtube.com/watch?v=ZUubfpnC2_M
Growing Avocados in South Coastal British Columbia (24 November, 2025): https://www.youtube.com/watch?v=kV2SL57U_bg
Growing Navel Oranges in an Unheated Greenhouse in South Coastal British Columbia, Canada (11 July, 2025): https://www.youtube.com/watch?v=qEkvAQz2UVQ
Growing Pomegranates in South Coastal British Columbia, Canada (11 July, 2025): https://www.youtube.com/watch?v=14dJ5hSWJYw
Growing Satsuma Mandarins Outdoors in South Coastal British Columbia, Canada (11 July, 2025): https://www.youtube.com/watch?v=RWMoqEiAB2A
Growing Trovita Sweet Oranges Outdoors in South Coastal British Columbia (29 October, 2020): https://www.youtube.com/watch?v=pZ_UJe9hbqM
Growing Yuzu and Sudachi in South Coastal British Columbia (28 October, 2020): https://www.youtube.com/watch?v=n5nbeHPjj2w
Growing Olives in South Coastal British Columbia, Canada (23 December, 2019): https://www.youtube.com/watch?v=tiVY-eXOm5s
Growing Feijoa (Acca sellowiana) in South Coastal British Columbia, Canada (2 July, 2018): https://www.youtube.com/watch?v=90iAFnKCLV0
Growing Loquats in South Coastal British Columbia, Canada (23 November, 2017): https://www.youtube.com/watch?v=zwThOgQglUY
Growing Pawpaws in South Coastal British Columbia, Canada (10 October, 2015): https://www.youtube.com/watch?v=Z_rl56CszXw
Growing Lemons and Limes in South Coastal British Columbia, Canada (23 April, 2015): https://www.youtube.com/watch?v=XX-R8sq6-vg
How to prune figs in a cool climate for first (breba) crop fig production (7 April, 2014): https://www.youtube.com/watch?v=RB0D_tuKgtQ

[Tim DH]

Hi Diane,
     Thanks for the links.
     I found the Mandarin video particularly interesting.

Tim DH