







Cup Plant
About Cup Plant
Cup Plant is a super rare houseplant đż that is easy to grow and needs regular watering to thrive. They do best in long-lasting, direct light âïž and should be less than 1 foot from a window.
Cup Plant likes soil that is well draining. Your plant shouldn't need added fertilizers if you repot each time it doubles in size.
Cup Plant belongs to the Silphium genus, and is native to the Southeastern United States.
Taxonomy
Silphium perfoliatum
Silphium
Asteraceae
Asterales
Also known as
Indian-gum, cup plant, cup-plant, cupleaf rosinweed and squarestem rosinweed

How to care for Cup Plant

How often to water your Cup Plant

every 9
Cup Plant needs 0.5 cups of water every 9 when it doesnât 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

Check the growing potential in your area
A plant's growing potential is determined from its location, the time of year, and current local weather.

Select a city to check sunlight intensity

Finding light for Cup Plant in your home

a window
Cup Plant love being close to bright, sunny windows đ.
Place it less than 1ft from a south-facing window to maximize the potential for growth.
Cup Plant does not tolerate low-light đ«.
Select your region to see how the current weather in your area affects the placement of Cup Plant in your home đĄ.

How to fertilize 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 itâs likely grown enough to need a larger pot anyway.
To replenish this plant's nutrients, repot your Cup Plant after it doubles in size or once a yearâwhichever comes first.

Cup Plant is generally considered an easy-to-care-for plant and makes a great choice for beginners!
Water Needs
Cup Plant prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Sunlight Needs
Cup Plant requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive đȘ. Select your region to see how the current weather in your area affects the placement in your home đĄ.
Toxicity
Greg does not have confirmed data on this plantâs toxicity. If you, a family member, or a pet consumes plant material of unknown toxicity, itâs always best to consult a medical professional.
If you or someone else ingested this plant, call Poison Control at US (800) 222-1222. If a pet consumed this plant, contact your veterinarian or the ASPCA at US (888) 426-4435.
Soil
Cup Plant does best in well-draining soil. A good soil will contain lots of organic matter such as coco coir as well as perlite or vermiculite to help with drainage. Adding a handful of perlite to regular store-bought potting soil should do the trick!
Fertilizer
Cup Plant should be repotted after it doubles in size or once a year, whichever comes first. Fresh potting soil has all the nutrients your plant needs, so as long as itâs refreshed yearly, you shouldnât need to use fertilizer. Remember, plants get their energy from sunlight, not fertilizer!
Growth Pattern
Cup Plant grows vertically and new growth will emerge from the top of the plant.
Growing Outdoors
USDA Hardiness Zone
Cup Plant can be grown outdoors in USDA Hardiness Zones 3a-9b. Find your local hardiness zone here.
Propagation
The seeds of Cup Plant can be used to grow new plants! After your plant flowers, any seeds that formed can be collected and germinated in potting soil.
Care Summary for Cup Plant
Cup Plant
Greg recommends:

0.5 cups every 9 days

< 1ft from a window

Repot after 2x growth
Based on the 4â pot your plant is in, and that it doesnât get direct sunlight.
