Frank's Sedge

Year-round

Frank's sedge is a clumping wetland sedge native to Tennessee, known for its bristly, spiky seed heads, and it does well in wet spots, rain gardens, and pond or stream edges around Memphis.

• Give it wet to consistently moist soil. This sedge is an obligate wetland plant and does not want to dry out for long stretches.
• Full sun to part shade both work. In Memphis's hot summers, a bit of afternoon shade keeps the foliage looking fresher.
• It forms a clumping mound roughly 1 to 2 and a half feet tall and spreads slowly by rhizomes and by self seeding.
• Watch for the bristly, spiky seed heads in early summer. They are one of this sedge's most distinctive features and add texture through the season.
• It tolerates standing water and periodic flooding, which makes it a strong choice for a rain garden, low spot, or the edge of a stream or pond.
• Sedges are slow to bounce back from hard pruning, so avoid shearing the whole clump down during the growing season.

Fall

Fall in Memphis stays mild, and Frank's sedge holds its green color well into the season while ripe seed heads drop seed nearby.

• Foliage typically stays green through fall in the Memphis area, so there is no need to cut it back now.
• Ripe seed heads will drop seed close by. If you do not want the clump to spread, snip the seed heads off before they shatter.
• Fall is a fine time to plant new divisions since the soil is still warm and rain tends to pick back up.
• Clear fallen tree leaves off the crown so the sedge is not smothered over winter.

Winter

Memphis winters are mild with occasional hard freezes, and Frank's sedge holds much of its foliage through the cold rather than dying back completely.

• Foliage often stays semi evergreen through a Memphis winter, sometimes fading to tan or bronze rather than dying back.
• Do the main cutback in late winter, just before new growth starts, and only trim off matted or damaged foliage. Do not shear the whole clump to the ground.
• Leaving seed heads and foliage standing through winter gives seed eating birds something to work with and adds texture to a wet corner of the yard.
• Established plants handle hard freezes fine. Keep an eye on newly planted divisions during their first winter, since the roots have not settled in as deeply yet.

Doing this cutback in late winter, right before new growth starts, keeps a front-yard wet spot looking tended rather than overgrown for HOA-conscious homeowners.

Spring

Spring is when Frank's sedge greens up and starts active growth around Memphis, with the last frost usually clearing by late March or early April.

• If you did not cut back old foliage in late winter, do it now before new growth gets going. Trim lightly, not down to bare ground.
• Keep the soil consistently wet as the plant wakes up. Spring rain in the Memphis area usually does most of the work here.
• Spring is a good window to divide an overgrown clump or move divisions to a new wet spot.
• New foliage should look bright green within a few weeks of warmer weather. If it does not, check that the spot is not drying out between rains.

Summer

Memphis summers are hot and humid, and Frank's sedge foliage can start looking tired by midsummer if the soil dries out.

• Keep the soil wet. This is the season this sedge is least forgiving about drying out, especially in full sun.
• A bit of afternoon shade helps the foliage hold its color through the hottest stretch of summer.
• The bristly seed heads are usually showiest in early summer, then fade as the season goes on.
• If foliage looks ragged or bleached by August, more water, not fertilizer, is usually the fix.