Japanese maple seeds are produced in the spring and the summer and they need to hang on the tree into the fall so they have a chance to mature. If you harvest seeds before they are ready, they are not going to grow because the embryo will not be fully developed.

The inside of the seed should be green, possibly a cream color. When you cut the seed it should have been nice and firm, not soft and squishy. Inside of a good seed you should see live tissue, not brown discolored tissue. ... Bad seeds, or non viable seeds will just go flat when you squish them with pliers.

Acer japonicum- also known as the Amur maple, this is a species native to Japan and south Korea. They tend to be more cold hardy than other Japanese maples and are ideal for bringing an architectural presence to the garden. ... The foliage is serrated and lobed but not as deeply dissected as some of the palmatum varieties.

Regarded as one of the most spectacular cascading Laceleaf Japanese Maples, award-winning Acer palmatum 'Orangeola' is also one of the most admired for its remarkable leaf color. This deciduous shrub or small tree features large, bright orange-red leaves in spring, adding sparkles to the garden.. . . . .364011233691!]0000000000000009783314147089!]