The talk of citrus plants thriving in our northern climate does sound a little challenging. This is especially so when you consider that the citrus genus originated from the areas of India, Indonesia and southern China where the climates are more tropical rainforest. However, given the right conditions, varieties such as the Meyers lemon, the Satsuma, Mandarin, Clementine and Calamondin are capable of surviving temperatures as low as -9° Celsius, although - to be fair - they may not look like much come the spring.
Cold hardy oranges are far more difficult to provide because – to be fair – there aren't any as yet. Even so, you can get still that orange effect by planting the tough Clementine and Calamondin. Although not quite as cold hardy but definitely worth a go is the flavoursome Satsuma mandarin especially if you are prepared to give it some protection.
For related articles click onto the following link:
COLD HARDY EXOTIC PLANTS FOR THAT TROPICAL GARDEN EFFECT
FLOWERING PLANTS FOR LATE SUMMER/AUTUMN COLOUR
HOW TO GROW A LEMON TREE IN A POT
HOW TO GROW A LEMON TREE FROM SEED
HOW TO GROW AN ORANGE TREE FROM SEED
HOW TO MAKE LIMONCELLO
HOW TO OVER-WINTER CITRUS PLANTS OUTSIDE
HOW TO OVERWINTER LILY BULBS
How to Take Care of a Lemon Tree in the Winter