Fruit/flower/leaf weight options:
These options control the directions of flowers, fruits and leaves.

Node size:
Size of each node (segments of the branches and trunk). Recommended value is 1.

Node aspect ratio:
This value controls the length of the node. A bigger value can make the branches longer. Recommended value is 1.

Max nodes:
This value controls how "big" the tree can grow. Recommended value is between 8000 and 10000. Too small, the tree will grow old pretty fast, no new branches can grow unless you shear the old ones off. Too big, weaker computer will have trouble updating and you may exeprience lags.

Curviness:
Set this value to 0 will make all branches straight. Default value is 0.08. If you want a twisted tree, set it to a bigger value.

Upwardness:
All the branches has a tendency to grow upward, and this value tells the game how big the tendency should be. The default value is 0.35. Too big, the tree will grow straight upward. You can use a negative value to make the branches grow downward.