English Oak, Truffle Oak, Pedunculate Oak

I planted three Quercus robur acorns in the late 1990's that came from the Auckland Domain Park on the North Island of New Zealand. Two o...Read Moref these acorns are now 15' and 20' tall English Oaks growing in Western Pennsylvania.
The Auckland Domain Park is the cites oldest park and was formed by a 140,000 year old volcano. Mature trees are found throughout this impressive Park. Many of the trees were planted in the 1840's and now have developed into the initial site of Auckland's Botanical Gardens.
The English Oak is a stately tree and requires an extra large yard to grow one. It is most often used in public parks and gardens. The English Oak tolerates a wide range of soils from acidic to alkaline. A moist silt loam with good drainage is preferred. The tree does not transplant easy due to a long taproot. Planting the acorn is a successful start to this admirable tree. The tree can live for hundreds of years.

Grows fairly well in sub tropical Brisbane. Although doesn't live as long as if gown in a cool climate. Have had mine 2 years or so. Lose...Read Mores most leafs in dry season but only goes dormant for a week and starts growing again in late winter. Great tree except seems to be a favourite of leaf miners. Handles our harsh sun well. Even in mid summer when uv can get to uv index 14 - 16 it doesn't get burnt. Amazingly hardy and adaptable. Temperatures here range from 20 - 24c in winter (dry season) and 30c - 35c in summer (wet) although has been fine through extremely hot weather at 44c.

The Oak is the dominant hardwood tree in Britain, but it needs deep, rich soil to grow to full size. Wood is very hard and strong and was...Read More much used for shipbuilding in previous centuries, many of the ancient oak forests in Britain were cut down for this purpose.

I like this tree a lot! I like oaks in general. This one is pretty common here in Argentina. Perhaps because of all the European Immigrat...Read Moreion we had.
I would like to notice one thing about this tree. Almost every year the leaves get white stains that look like fungus and also a sticky stuff. Does any of you guys have an idea about what it is and how to treat it? I'm asking you, Palmbob! You seem to know a LOT, so... please give me an advise!
Thanks.