Plant Care Japanese Silver Grass

Japanese Silver Grass

Also known as

Cosmopolitan Miscanthus Grass


Miscanthus sinensis 'Cosmopolitan'

How to care for Japanese Silver Grass


How often to water your Japanese Silver Grass

Water needs for Japanese Silver Grass
0.5 cups
every 9

Japanese Silver Grass needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot located in Boston, Massachusetts.

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.

Plant care guide for Japanese Silver Grass in Boston, Massachusetts

Boston, Massachusetts

39% Low

Growing Japanese Silver Grass in Boston right now

Light needs for plant Japanese Silver Grass in Boston, Massachusetts

Plant growth potential is currently very low 📉

November 28th, 2021

Sunlight intensity as measured by “net radiation” in Boston is currently very low 📉.

The availability of high quality sunlight in your home impacts ability for plants to thrive and is key in deter…

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Light needs for plant Japanese Silver Grass in Boston, Massachusetts

Sunlight intensity will decrease by 33.6% ☀️

November 28th, 2021

Boston is trending towards lower sunlight intensity!

The amount of sunlight in Boston is expected to decrease by 33.6% over the next 2 weeks to an average of 5.8 megajoules of energy per m2 per da…

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Light needs for plant Japanese Silver Grass in Boston, Massachusetts

Daylight will decrease by 1.3 hours 📉

November 27th, 2021

This month, Boston is getting an average of 7.5 hours of clear sky sunlight per day.

Hours of daylight will decrease by 12.8% over the next two weeks. Your plants will get 8.9 total hours of dayli…

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Finding light for Cosmopolitan Miscanthus Grass in your home

Light needs and placement for plant Japanese Silver Grass: 1ft from a window
1ft or less from
a window

Japanese Silver Grass love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to ensure it receives enough light to survive during this time of reduced sunlight intensity in Boston, Massachusetts ⛅.

Japanese Silver Grass does not tolerate low-light 🚫.


How to fertilize Japanese Silver Grass

Nutrient, fertilizer, and repotting needs for Japanese Silver Grass: 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 Japanese Silver Grass after it doubles in size or once a year—whichever comes first.

When to repot Japanese Silver Grass

Nutrient needs for plant Japanese Silver Grass in Boston, Massachusetts

Is this a good time of year to repot? No ⏳

November 28th, 2021

The growing potential in Boston is very low 📉.

Repotting in late fall or winter when the day lengths are shorter can be very stressful for a plant and cause it to go into shock.

It's best to r…

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Water Needs
Sunlight Needs

Care Summary for Japanese Silver Grass

Japanese Silver Grass

Greg recommends:


0.5 cups every 9 days


< 1ft from a window


Repot after 2x growth

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

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