Duo tree has been grafted with two delicious pear varietiesbeurre hardy a classic french dessert pear from the early 1800s, whose medium to large fruits boast soft, buttery flesh with an excellent flavour. Pick when still firm and ripen indoors for best quality fruit. Ready to harvest from early autumn. Maximum height 2.5 3m 8' 10'.williams bon chretien usually just called williams pear. Large, sweet smooth and very juicy! It turns yellow when ripe, and while a superb eating pear, it's also great for stewing. Reliably heavy cropping.one of the easiest of trees to grow. Our delicious varieties are grown on quince a rootstock giving a tree with moderate vigour and promoting pears to fruit at an early age.for planting and growing advice read our pear tree growing guide.