The Tropical Fruit Forum

Yeah, I thought that too when I read their method. I went about it a little bit different than them. Since I had read so much about the associations between node count and flowering, I figured I should try to get the plant to grow as tall as possible as quickly as possible. At the same time I had read that yuzu can sometimes flower on the lower branches at the beginning. Therefore, I didn't cut the side branches off but instead trained them to the horizontal like is done in intensive apple orchards in order to maintain the apical dominance of the central leader. In my mind that had the extra advantage that the lower branches would contribute with their photosynthesis to the total growth of the tree. The growth was truly impressive in that often a new growth spurt began before the old one had completely hardened off. I also ask myself if the use of horn meal as a nitrogen source also played a role in that it provided a gradual slow release of nutrients. I am always careful with horn meal though after having given the plants ammonia poisoning with it. That wasn't pretty.
The tree ended up bending over on its own and I believe it was due to two factors. For one it had simply gotten so tall it hit the ceiling of my apartment. That caused it to bend over. Then, when I took it outside the new growth was so green that it was able to support it's own weight and ended up bending over because my plant stake wasn't able to reach up to the very top of the plant.

A yuzu tree grown from seed has proven to be reliably hardy for me unprotected on a roof terrace in an urban setting. I have found that the decisive factors for me for winter hardiness are next to the genetic predisposition of the plant the size of the stem and the pot size. The pot has to deep enough to minimize the perched water table and prevent it from completely freezing through when the Arctic temperatures hit. Aside from its hardiness, yuzu is attractive to me for be very fast growing when given the right conditions, namely warm days and nights and plenty of moisture and fertilizer. My loft apartment provides plenty of heat in the summer and I was able to get a meter and a half of growth on a tree in one summer. That was impressive. These factors make me consider using it as a rootstock for getting plants up to size before I try to overwinter them on the balcony. I recall reading that the Japanese used yuzu for a time as a rootstock for satsumas and it pops up as a rootstock every now and then in scientific papers but perhaps someone on this forum has experience with it as a rootstock already and can report of their findings. I presume it would be a good match for plants which are considered to be related to yuzu, like sudachi or kabosu. I plant to graft my yuzu on it this season if the seedlings that I germinated last month grow fast enough.

Hello everyone,
I am looking for cuttings of seedless Kishu mandarine (citrus kinokuni mukakukishu). I live in Germany so I am looking for a source in Europe. I have found it at a nursery in France, but it tends to be perpetually sold out. I am willing to buy or trade for the cuttings. Regarding the size of the cuttings, I am pretty flexible.
Thanks in advance!

How does the cold hardiness of your selection 5starxkeraji compare to that of keraji?
What are your plans for increasing the size of the fruits?
Are there any siblings from the original cross that could be used as breeding partners?
5starXkeraji really fascinates me.

All I have found is the following plant list: http://www.giardinihanbury.com/giardino/hortus-mortolensis
That's probably the same as what you found. That's a fascinating find you have there.

Aha, Thanks.

and, has the fruit ripened yet?