Grass is layers, not blades
Don't draw grass blade by blade. Build it in layers of value from a base up to highlight tips, using a grass brush that fans out many blades at once. Direction, value and a little variation do all the work.
1. Lay the base
Block the ground with a flat base green (or the dominant grass color), slightly darker than the final — you'll build lighter on top. Add a gentle gradient: cooler and lighter toward the distance, warmer and darker in the foreground.
2. Build up grass in passes
With a grass scatter brush from the nature category, stroke upward in passes, dark to light: a mid-tone layer, then lighter blades, then a few bright highlight tips. Each pass adds fewer, lighter blades. See the best free nature brushes for grass brushes.
3. Mind direction and clumping
Grass grows in clumps leaning in slightly different directions, not a uniform comb. Vary the lean and let some blades cross. Wind can give the whole field a direction. This irregularity is what separates natural grass from a fake even texture.
4. Show depth
Grass has perspective too: taller, larger, more detailed blades in the foreground; shorter, finer, lower-contrast grass in the distance that becomes a smooth texture near the horizon. Don't draw individual blades far away — it breaks the depth.
5. Add ground, dirt and paths
Break up grass with dirt patches, paths and rocks for interest. Block a path with an earthy color, add texture and pebbles, and let grass edges fringe into it. Use texture brushes from the texture category for soil and gravel.
6. Flowers and detail
Scatter a few small flowers or weeds for life — floral stamps work great here; see floral stamps. Keep them sparse and varied so they read as accents, not a pattern.
Brushes and next steps
Draw grass with free grass, scatter and texture brushes from the nature category or any free brushset. Combine grass with a full landscape, trees and a painted sky.