Purple Cup Plant
Taxonomy
Silphium perfoliatum var. purpureum
Silphium
Asteraceae
Asterales
How to care for Purple Cup Plant
How often to water your Purple Cup Plant
every 9
Purple Cup Plant needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.
Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Water 0.5 cups every
9
Finding light for Purple Cup Plant in your home
a window
Purple Cup Plant love being close to bright, sunny windows 😎.
Place it less than 1ft from a south-facing window to maximize the potential for growth.
Purple Cup Plant does not tolerate low-light 🚫.
Select your region to see how the current weather in your area affects the placement of Purple Cup Plant in your home 🏡.
How to fertilize Purple Cup Plant
Most potting soils come with ample nutrients which plants use to produce new growth.
By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.
To replenish this plant's nutrients, repot your Purple Cup Plant after it doubles in size or once a year—whichever comes first.
Care Summary for Purple Cup Plant
Purple Cup Plant
Greg recommends:
Water
0.5 cups every 9 days
Placement
< 1ft from a window
Nutrients
Repot after 2x growth
Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.