Plant Care Silver Arrow

Silver Arrow

Also known as

Silver Arrows, Silver Arrows, Royal Cross, Silver Arrows Cactus and Royal Cross Mammillaria


Mammillaria karwinskiana

How to care for Silver Arrow


How often to water your Silver Arrow

Water needs for Silver Arrow
0.5 cups
every 12

Silver Arrow needs 0.5 cups of water every 12 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.

Calculate water needs of Silver Arrow

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 Silver Arrows in your home

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

Silver Arrow love being close to bright, sunny windows 😎.

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

Silver Arrow does not tolerate low-light 🚫.

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


How to fertilize Silver Arrow

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

Water Needs
Sunlight Needs
Native Region

Care Summary for Silver Arrow

Silver Arrow

Silver Arrow

Greg recommends:


0.5 cups every 12 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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