Na daaah of caorse you do
No, they are self fertile.
Yes, they help pollinate different flowers and fruit trees
It depends on the type of apple tree, some are self pollinating and some need other trees pollen in order to pollinate.
Bees pollinate individual blossoms on a tree so it would need a colony of bees (up to 80000) to pollinate a whole tree.
Not necessarily. If you have other plants in your garden (Flowers, shrubs, etc.) you will not need two apple trees. If you have no other plants in your garden, then yes, you will need two apple trees to pollinate.
It depends on the variety. Many varieties of fruit tree are self-sterile, meaning that they cannot pollinate with themselves. Due to grafting, if you buy two trees of the same variety, they are genetically identical- basically they are the same tree. So, you need a different variety of the same fruit in order for cross pollination to occur. Some trees are more genetically compatible for cross pollination, which is why in nursery catalogs, different trees are said to be good pollinators. Commercial orchards often plant crab-apple trees in with the apples to ensure good pollination.
If you mean you want to cross breed two plants? First of all you need a male and a female. When the male is ready to pollinate you need to transfer the male pollen to the female. Not all plants are compatible.
Lemon trees may grow in areas with mild winters (since they are sensitive to frost). In such climates, the trees should be planted in sunny areas with good water drainage.
Apple farmers need bees to pollinate their apple trees. Where bees have been eradicated by pesticides, more bees, or hand pollination, are necessary for the trees to bear fruit.
Yes. Stella Cherries are a good choice since they Self Pollinate and Bing Cherries do well also but will need to be pollinated...
Lemon trees can live more than 30 years. You need to take care of them and not put them in a container.
In short, they do. Greenhouses are not usually sealed, and insects can get in and out, and they will pollinate the flowers.