Plant Care Juncus gerardii

Juncus gerardii

About Juncus gerardii

Juncus gerardii is a super rare houseplant 🌿 that needs regular watering to thrive. They do best in long-lasting, direct light ☀️ and should be less than 1 foot from a window.

Juncus gerardii likes soil that is good at retaining moisture. Your plant shouldn't need added fertilizers if you repot each time it doubles in size.


Juncus gerardi

Also known as

Juncus gerardii, blackgrass, black needle rush and saltmarsh rush

How to care for Juncus gerardii


How often to water your Juncus gerardii

Water needs for Juncus gerardii
0.5 cups
every 9

Juncus gerardii 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

Does your plant get direct sunlight?

Select the pot size


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 Juncus gerardii in your home

Light needs and placement for plant Juncus gerardii: 1ft from a window
1ft or less from
a window

Juncus gerardii love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to maximize the potential for growth.

Juncus gerardii does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Juncus gerardii in your home 🏡.


How to fertilize Juncus gerardii

Nutrient, fertilizer, and repotting needs for Juncus gerardii: repot after 2X growth

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 Juncus gerardii after it doubles in size or once a year—whichever comes first.

Water Needs
Sunlight Needs

Care Summary for Juncus gerardii

Juncus gerardii

Greg recommends:


0.5 cups every 9 days


< 1ft from a window


Repot after 2x growth

Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.

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