Can you share another photo? The leaves of the plant were just starting to expand and there isn't enough showing to give us an idea.
Given that it's coming out of a tiny hole/tear in the landscape fabric it is more likely to be a weed.
Any new photos (in clear focus please) can be attached directly to this reply.


Christine

Here’s another photo of unknown weed.  Also what kind of grass is this please?  Thanks 



The seedling is still very young and hard to ID with certainty. It resembles a Black Walnut, but we are not certain. If you scratch-and-sniff the leaf stem on these trees, they usually have a distinctive and pungent scent, but might not when they are this small.

We are unable to ID the turfgrass in the photo...not enough distinguishing features and fine details are visible, especially with mown grass. If you would like to try to determine what grass it is, you can use the key and descriptions in the links below to narrow-down the possibilities. Illustrations of what the structures or features look like (ligule, vernation, auricles, collar, etc.) that are needed for comparison are included in each page.

• Turfgrass Identification -- Ohio State
• Weedy Grass Identification -- Ohio State (your grass isn't necessarily a weed, but we'll include this just in case)
• Cool-season Turfgrass Identification -- Penn State

Tall fescue is the most commonly-grown turfgrass type in Maryland, but seed blends often include a small amount of Kentucky Bluegrass and Perennial Ryegrass. Even if it's confirmed to be one of these three turf types, we will not be able to determine which cultivar it is, as many dozen cultivars exist for each.

Miri

Here is a better photo.  Can you tell



Thank you for the new photo. This looks like a Black Walnut seedling. It should be somewhat easy to pull or dig up at this stage, but if you cut it down, it probably won't regrow since it's so young. If it does regrow, keep cutting the leaves off and it will starve soon enough and stop regrowing. A nearby mature Black Walnut tree is producing nuts that squirrels or other wildlife is burying, allowing the seeds to sprout. Walnuts are valuable trees for wildlife, but unwanted seedlings can be physically removed as soon as they're spotted. While you could carefully spot-treat each with herbicide, that should not be necessary in this situation. Areas of bare soil can allow weed seeds to sprout, but in the case of tree nuts, it's usually animals like squirrels, chipmunks, or Blue Jays that collect and bury nuts for later consumption. (Of course, they forget a few since they are sprouting.) There isn't an easy way to discourage them from doing this since they can dig through mulch to reach the soil underneath, or will dig into lawn as well. Most seedling trees will not tolerate being cut down by a lawn mower more than once or twice, so that's usually enough to eliminate them.

Miri