The Queen, and her gardening team, are generally not worried about contamination from other worlds here. After all it is the Kingdom that has the magical plants - the ones that eat the unwary passer by, those that grow upside down, those who spray their pollen at great distances and deliberately target the hayfever sufferers and those that give the bees and wasps that pollinate them so much nectar it is not uncommon to see swarms of drunken insects, a known hazard during the early springtime especially.
There are no plans to bring back examples of wildlife as there are concerns these wouldn’t survive the transportation process yet alone conditions in the Kingdom. It is felt plants are generally hardier and adapt quicker to a new environment.
Seasons in the Kingdom are the same as on Earth but certain areas keep their favourite seasons far longer than we do. For example, there is a Winter Wonderland area in the Kingdom so the other seasons are brief. Flora and fauna again resemble that found on Earth but there are species in the Kingdom that could never be found outside a magical environment.
There are trees and beanstalks that grow and grow and where climbing is very much done at the climber’s own risk. Not only is there the terrifying thought of what you might find at the top, the creatures that live in these plants need facing as well. Not all are friendly!
The giant flowers in the Palace gardens really are giant, as are the bees that pollinate them! Colours are brighter than on Earth. The subtler shades are not appreciated by most in the realm, the attitude being if you’ve got colour, you may as well have as much of it as possible! Colour blindness is unknown in the Kingdom though given the brightness of the hues this counts as a miracle though the Queen and Eileen believe eyes react to whatever environment they cope with and magical eyes are used to such brightness.