http://imageshack.us/photo/my-images/840/899a1kopie.jpg/
http://imageshack.us/photo/my-images/855/899a2.jpg/
http://imageshack.us/photo/my-images/814/899a3.jpg/

I picked the first ever fruit of 899A today. It was rather tiny but smell and taste were pleasant. No bitterness no aftertaste nothing reminds of poncirus. The taste resembles mandarin plus orange plus pummelo flavedo. Pulp is sour and sweet and should become sweet when fully ripe. A nice find!
/Robert

great post! I do grow the RHS899 J, grafted onto carrizo, tiny a still not fruiting... how big is your tree for fruiting so nicely? thanks for the pics, looks very promising!

In fact this "tree" is not more than 35cm (1ft) high.
I have HRS899J aswell.
/Roberto

The HRS899 (Poncirus x Changsha) must be a variety primarily in Europe. Perhaps someone might have it here, but I've not heard of it in the USA. Being a poncirus cross, its value must be that it can be grown outside of a traditional citrus growing area. - Millet (360 ABO-)

yes indeed, Bernard Voss obtained originally seeds from the US and from those seeds he obtained the cultivars RHS 899 A to RHS 899 R. He released to the public the RHS A and the RHS J which are reported to be edible. thanks to Roberto, we now know it is the case for the A. The Swiss nursery Eisenhut report the J to be edible like a sweet orange, but so far no experience was recorded, even fruit pictures aren't available... wait and see! frost hardiness is given down to -15C; fruits should be harvested in November which makes a great candidate for outside. once my RHS 899J will be arount 100cm, I'll put it in the ground for testing.

My 899J is more than 3 meters high. It is in the open ground for 5 years but no flowers. 899J from my experience is hardy up to -13C, after -15.8C it got a severe damage on the trunk and lost all his leaves.

Roberto, how long it took from flowers to fruits for your 899A?
The fruit looks beautiful. Does it contain only one seed?

Very interesting thread, thanks to everyone for their information!

There were two tiny seeds but they seemed to be not fully developed.
From flower to ripe fruit it took about eight months. Lot of time for such a little thing. I forgot to mention that the whole fruit is not bigger than 2cm. (For those who are not familiar with Euro-cent coins)
/Robert

I am not sure whether Eisenhut is right or not. As far as I know HRS899J has not flowered yet. I've never heard of flowers or fruit. Even Bernhard has never seen a flower of 899J less tasted a fruit. My fruit of 899A seems to be the first of its kind aswell. There is also one fruit of 899F but it is not ripe yet.

The second fruit on the picture fell off...

Snek,

I do not feed much and keep these plants quite dry and in tiny pots. Other than with my son I am a fan of strict education with my plants

He is the Marquis de Sade of the citrus plants ..