Mail Order and Click and Collect, Glasshouses not open at the moment. Plant heights are approximate and measured from ground (bottom of pot) unless stated otherwise.
Willits citrange x Fortunella margarita:
This is a sweet orange crossed with Poncirus trifoliata then crossed with Nagami oval kumquat.
The orange fruits it produces are like large kumquats.
Another one to experiment with for hardiness.
The Citrus Centre
Kaffir Or Makrut Lime