Don't have a Orange tree but will look to get one, thinking seedless Valencia
Did you mean Mandarin, mine is an imperial which I think is the best type? Think have had it 5-6 years was only small 1/2 meter when I got it, flowered but no fruit first two years. Was a bit disheartening the first few years see an abundance of flowers and fruit to start with but then lots and most of the tiny fruit drop off but for the last couple of years been getting more and more fruit maturing.
Not sure if fertilizer and mulch with sheep poo has helped but doest hurt, think it's normal that fruit trees drop a lot of fruit and in some cases picked off as young trees can't support so many fruit. Also thinning the fruit allows the remaining fruit to be bigger.
Yeah wind will knock of the flowers, all fruit trees take time to establish/mature before they start producing, some take many years. Grafted fruit trees will produce sooner
