You can reseed a lawn that has dead grass, but it is best to remove the dead patches before you begin. Removing the dead turf and testing the soil will help you determine what is killing the grass so you can make the necessary amendments to prevent the problem from recurring. Once you have made the appropriate adjustments, you can rake, fertilize, and reseed. If your lawn has many large dead patches, it may be more effective to remove all the existing grass, amend the soil, and start over from scratch.

Choosing between sod and seed depends on your budget, timeline, and maintenance preferences.

Sod:

• Pros: Provides an instant, lush lawn and immediate curb appeal. It's more resistant to weeds and erosion, can be installed any time during the growing season, and offers a consistent appearance.

• Cons: Has a higher upfront cost, typically $0.90 to $1.80 more per square foot than seed. It offers fewer grass varieties and must be installed immediately upon delivery.

Seed:

• Pros: Less expensive upfront, making it a budget-friendly option. It offers a wider variety of grass types and is easier for a DIY installation.

• Cons: Takes much longer to establish, potentially up to two years for a full lawn. It requires more maintenance, including regular weed control, and is more difficult to cultivate.

Ultimately, if you want a beautiful lawn quickly and have a larger budget, sod is an excellent choice. If you are patient, want to save money, and prefer a wider selection of grass types, seeding may be the better option.

There are plenty of products to help green up your grass. Try an iron supplement spray or fertilizer that is rich in nitrogen. You can also apply a thin layer of compost on top of your lawn at the beginning of spring to give the grass a nutrition boost, which helps it achieve that bright color you are looking for. 

Technically no, but they can look very similar and people often refer to the weedy grasses interchangeably. However, several differences keep these species separate. Crabgrass is often a darker color than carpetgrass and tends to sprout much earlier in spring. When allowed to grow out, crabgrass grows stems outward from the center of a stalk in a star-like pattern, which carpetgrass does not have.