Hoary Skullcap

Year-round

Downy skullcap is a tall, easy perennial with spikes of purple-blue flowers in midsummer. It handles light from shade to full sun and soil from dry to moist. It asks for little once it is settled in.

• Grows 2 to 3 feet tall and 1.5 to 2 feet wide.
• Light from deep shade to full sun. Part shade is a good start.
• Soil dry to moist and well drained. Sources list acidic soil, so skip lime.
• Flowers open June through September, mostly July and August.
• Sources disagree on deer. NC State lists it as resistant, Wildflower Center says deer browse it.

Cut spent flower spikes if you want a tidier look.

Fall

Seed capsules form from late summer into fall as the plant winds down.

• Leave seed heads if you want more plants.
• Cut stems back after frost to clean up the bed.
• Water only during a dry stretch.
• Rake leaves off the crown.

Winter

The plant is dormant in winter with no care needed.

• No watering or feeding is needed.
• Cut old stems down any time before new growth.
• Keep heavy mulch off the crown.
• Mark the spot so it is easy to find in spring.

Spring

Plant or divide as growth starts in April. Give it room to reach full height.

• Plant in sun to part shade in well-drained soil.
• Water new plants about once a week if rain is under an inch.
• Do not add lime or fertilizer.
• Space plants 1.5 to 2 feet apart.

Summer

Flower spikes open in midsummer. It tolerates heat and drought once rooted.

• Water deeply in long dry spells, then let the soil dry.
• Water new plants more often.
• Remove spent flower spikes if you want a neater look.
• Check for deer browsing and protect it if needed.

Year-round

Hoary skullcap is native to the Florida Panhandle's open, dry woodlands, including the clay-rich Red Hills around Tallahassee, so it is naturally suited to your yard once it is sited well.

• This plant is native to the Florida Panhandle, found in dry, open woodlands from the Red Hills down through much of the eastern US.
• Give it full sun to light shade and well-drained soil. It tolerates both Tallahassee's sandy patches and the area's heavier clay.
• Once established it is fairly drought tolerant, though during Tallahassee's hot, humid summer an occasional deep soak helps between thunderstorms.
• A light 2 inch mulch layer is enough. Good drainage matters more than moisture retention for this species.
• Common mistake: planting it in a low, soggy spot. Skullcap wants well-drained ground and can struggle if water pools around the roots after Tallahassee's heavy summer downpours.

Fall

Fall is mild and pleasant in Tallahassee, and a second good window for planting or dividing skullcap as the summer storms ease off.

• Seeds ripen in early fall. Leave some spikes standing to self-sow or to feed birds.
• Cut back foliage once it browns, though it is fine to leave it standing into winter for structure.
• Watering needs drop off as fall rain and cooler temperatures return.
• This is a good second planting window if you missed spring.

Winter

Tallahassee winters are mild, usually just light frost with rare hard freezes, and skullcap simply dies back and returns reliably each spring.

• Cut old stems back to the ground in late winter before new growth starts. This is the plant's one real yearly maintenance task.
• No need to mulch heavily for cold protection. Panhandle winters are not severe enough to require it.
• Well-drained soil still matters in winter since Tallahassee's clay-heavy Red Hills soil can stay soggy after winter rain.
• Expect the plant to look bare through winter, that is normal, new growth returns in spring.

Spring

Spring, before Tallahassee's summer heat and humidity set in, is a good time to plant or divide skullcap.

• Plant or divide clumps in March or April while temperatures are still mild.
• New growth comes up from the base. Cut back any old winter stems now if you did not in late winter.
• Keep new transplants watered while roots establish, before the summer thunderstorm pattern kicks in.
• Watch for the first hot spells, they can arrive early in North Florida.

Summer

Tallahassee's long, hot, stormy summer is skullcap's main bloom season, spikes of blue-purple flowers from June into September.

• Expect blooms from June through September, right through the Panhandle's hottest, most humid stretch.
• Deadhead spent flower spikes to keep it blooming longer, or leave a few to self-sow for next year.
• Good drainage matters most now. Frequent Panhandle thunderstorms can waterlog low spots fast.
• No extra fertilizer needed, Tallahassee's summer rain and humidity keep it going on its own.