'Korean Rock' Fern
'Korean Rock' Fern
Polystichum tsus-simense
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Among Earth's oldest plant groups (dating back 360 million years!), ferns bring ancient forest magic to modern homes. This variety features delicate, bushy fronds that create a soft, ethereal aesthetic. Unlike most houseplants, ferns reproduce via spores rather than seeds, and have no flowers. They thrive in the humid, filtered light of forest floors, so recreating these conditions ensures lush growth. Perfect for bathrooms where they'll love the steamy environment.
Best spot: Locate 3-6 feet from windows, or at east-facing spot
Alternative: Bathroom or office with moderate daylight
STEP 2: Light Duration
Needs moderate light for 4-6 hours daily
Can adapt to artificial lighting (12-14 hours daily)
STEP 3: Rotate Weekly
Spin plant quarter-turn weekly for balanced form
How to check: Feel soil 2 inches deep - water when dry to the touch
Pro tip: Develop a consistent soil-checking schedule
STEP 2: Water Thoroughly
Water deeply until excess flows from drainage holes
Always empty catch tray - no sitting in water
STEP 3: Wait and Repeat
Frequency: Water 7-10 days apart in warm months, 10-14 days in cold
Use lukewarm or filtered water if available
Bleached, pale leaves
This is a sign of too much light. Move to location with filtered indirect light
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Loss of leaf variegation
This is a sign of too little light. Move to location with more consistent bright light
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Dropping leaves, soggy soil
This is a sign of overwatering. Allow soil to dry more thoroughly between waterings
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Leaves curling, soil pulling away
This is a sign of underwatering. Soak soil completely. Resume regular schedule
