This article will look at two distinct species – Bahia grass (Paspalum notatum) and St. Augustine grass (Stenotaphrum secundatum). You will discover what traits they have in common, as well as how they differ. 

Bahia Grass vs. St. Augustine Grass: Comparison

To fully understand the differences between Bahia grass and St. Augustine grass, it is helpful to explore specific categories. The chart below explores some of the key characteristics of each species. Bahia grass (Paspalum notatum) and St. Augustine grass (Stenotaphrum secundatum) are great additions to low-maintenance lawns of homes or businesses. Additionally, they are excellent additions to your pasture, as feed for livestock or to grow as hay. You will also find both species used in erosion control.  Despite these similarities between Bahia grass and St. Augustine grass, the two have some significant differences. The primary ones are their origins, leaves, seed heads, and growing requirements. Below, we explore each of these categories more in-depth.

Bahia Grass vs. St. Augustine Grass: Origin

Bahia grass is native to South America. It is common throughout Central and South America and the West Indies. After getting introduced in the southeastern United States for erosion control and grazing, it became naturalized in that region. However, St. Augustine grass stands in stark contrast to Bahia grass. It is native to the Atlantic seaboard and naturally spread along the coast due to the ability of its inflorescences to withstand some sea travel.

Bahia Grass vs. St Augustine Grass: Leaves

The leaves of Bahia grass are tough, flat, in-rolled, and typically hairless. They are relatively thin, with ⅛-¼ inch wide blades. However, they grow long, reaching anywhere between 8 and 20 inches. And they also taper to a point at the end. On the other hand, the leaves of St. Augustine grass are slightly wider, reaching a maximum width of ½ inch. They are blue-gray, smooth on both sides, and somewhat hairy. Their flat appearance ends in a rounded and blunted tip. And the blades grow significantly shorter, reaching only roughly 1-6 inches long. 

Bahia Grass vs. St. Augustine Grass: Seed Heads

The seeds of Bahia grass are highly prolific. Typically, a duo of seed heads develops on the end of the tapered stem. Occasionally, a third may show up below the terminal pair of racemes. These seeds are an important food source for wildlife, such as small mammals, deer, and birds. However, they can be toxic to cattle if eaten in too large of a quantity.  In contrast, St. Augustine Grass produces few viable seeds. The seed heads grow as singles at the end of a thick stalk that protrudes above the leaves. They may develop flowers with a white-brown color.

Bahia Grass vs. St. Augustine Grass: Growing Requirements

Bahia grass is a deep-rooted perennial and is highly prolific. Its scaly, stout rhizomes allow it to spread into a dense sod. It is more shade tolerant than other popular grasses, such as Bermuda grass.  Additionally, it grows well in sandy, low-fertility, or drought-prone soil. The only factor that Bahia grass is picky about is the soil pH. It does not tolerate pH levels above 6.5. You can establish Bahia grass in your lawn or pasture using seed or sod. However, opt for spring or early summer months to best plant Bahia grass, as there will be adequate moisture during these months. It has a slow germination rate, so it may take a few months for your new Bahia grass to get fully established. On the other hand, St. Augustine grass flourishes in moisture-rich regions. So it can survive flooding and overwatering. So, it is popular for erosion control near shorelines.  The deep-rooted turf grass is highly shade tolerant. It spreads by stolons and forms a dense and leafy sod. This popular grass can is easy to establish from plugs or sod. And while it prefers sandy loam or clay soils, it will do well in any area with decent soil fertility. Additionally, St. Augustine grass does best in slightly acidic to neutral soil.

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Yes, Bahia grass makes an outstanding addition to lawns. It produces a thick, dense sod that is durable and low-maintenance. Bahia grass is suited well for drought-stricken areas or sections of low-quality soil. What is the disadvantage of Bahia grass? It has a rapid growth rate. And is quite tall, so it requires consistent attention and regular mowing. If you wait too long between mowings, seed heads may develop that are tough on the blades of your lawnmower. How do I know if I have St. Augustine grass? St. Augustine grass has a very distinctive appearance. It is a thick, dense turf grass that borders on dark green. You will notice singular seed heads rising above the blades if it goes to seed. Which grass is better, Bermuda or St. Augustine? It depends on what USDA Hardiness Zone you live in. St. Augustine thrives in Zones 8-10, but Bermuda grows in Zones 7-10. Additionally, St. Augustine is the ideal grass for coastal areas, as it can withstand salt spray. Which grass is better, Bahia or St. Augustine? St. Augustine is often the preferred choice over Bahia. However, which is the most appropriate choice will depend entirely upon the growing conditions. Bahia is ideal for areas that receive little moisture and are prone to periods of drought. But it does not hold up well to overwatering. On the other hand, St. Augustine thrives in more moist environments and can withstand regular (or occasionally excess) moisture.