Slopes and hills in your yard can add dimension and an attractive landscape. Slopes and hills also provide the means for excellent sledding fun in northern climates. Growing grass on a slope though can present a challenge if you don't take the right methods to keep it in place. Winds, torrential rains and even regular watering can wash it all away to the bottom of the slope. Water can also erode trenches into the soil, which leads to unneeded landscaping. With the right equipment and materials, you can grow grass seed on a slope fairly easily.
Rake the hill and remove all rocks and debris. The raking will also loosen the soil and make it suitable for planting.
Pour starter fertilizer into your broadcast spreader, and set the dial to the correct application rate. Look for a chart on the back of the fertilizer bag that lists the dial settings for different spreaders.
Spread the fertilizer across the area you would like to seed. Walk parallel paths across the area until you have covered the entire area with fertilizer.
Pour your grass seed into your broadcast spreader. Set the dial on the spreader according to the application rate listed on the grass seed bag.
Spread the grass seed across the planting area by walking parallel paths across the area.
Rake the seeds into the top 1/8 inch of the soil, and roll the area with an empty lawn roller to make good soil-to-seed contact.
Apply a thin layer of peat moss over the entire area. Spread straw over the peat poss in a layer just thick enough that you don't see the underlying soil beneath it---any thicker and it could smother the new seeds.
Water the seeded area with a light amount of water two to three times per day. Keep the seeds constantly moist and do not let them dry out. Avoid soaking them so that they become waterlogged. The correct amount of water varies by location, sun amount and soil type; adjust the watering rate accordingly to achieve a constantly moist seedbed.