Dream meaning of poplars
To dream of seeing poplars, is an omen of good, if they are in leaf or bloom.
For a young woman to stand by her lover beneath the blossoms and leaves of a tulip poplar, she will realize her most extravagant hopes.
Her lover will be handsome and polished. Wealth and friends will be hers.
If they are leafless and withered, she will meet with disappointments.

In addition to the general symbolism attached to trees, wood and vegetable life, the poplar has a special allegorical significance connected with the fact that the two sides of the poplar leaf are of a different shade of green. Thus, it becomes the tree of life, bright green on the side of water (moon) and a darker green on the side of fire (sun). The poplar also has a place within the general range of bipolar symbols (positive-negative).
Poplars in a dream are a warning against reckless companions who will try to tempt you into foolishly dangerous adventures; be sensible – it’s better to be square than squalid.