Grafted Moon Cacti Assorted 2”

Gymnocalycium mihanovichii. Grafted Moon Cactus

Description

Vibrant and sculptural, the Moon Cactus is instantly recognizable for its candy-colored top—shades of hot pink, orange, yellow, or red—grafted onto a green cactus base. The colorful “moon” portion is actually a mutation of Gymnocalycium mihanovichii that lacks chlorophyll and relies on the green base cactus (Hylocereus) to photosynthesize. Together, they form one of the most playful pairings in the cactus world.

Why We Love It

Fun and eye-catching, this living collaboration between two species feels equal parts art and science experiment. Its jewel-toned hues brighten any windowsill and make a cheerful gift for plant beginners and collectors alike.

Care

Light
Provide bright gentle light—a few hours of morning or late-afternoon sun is ideal. Avoid prolonged hot sun, which can cause the grafted top to fade or scorch.

Water
Allow the soil to dry completely between waterings. Water deeply, then drain thoroughly. In winter, water sparingly (about once every 3–4 weeks).

Temperature & Humidity
Prefers warm conditions between 65–85°F. Protect from cold drafts and avoid temperatures below 50°F. Normal household humidity is perfect.

Soil
Use a well-draining cactus or succulent mix. Add extra perlite or pumice if the soil feels dense.

Fertilizer
Feed with a diluted cactus fertilizer every 4–6 weeks during spring and summer. Skip feeding in fall and winter.

Repotting
Repot only when the rootstock outgrows its container—usually every 2–3 years. Handle carefully to avoid damaging the graft union.

Notes

• The colorful top (Gymnocalycium mihanovichii) cannot survive without its green base (Hylocereus), since it cannot produce its own chlorophyll.

• Over time, the graft may separate. It’s possible to regraft the colorful portion onto a fresh rootstock if desired.

• These plants rarely bloom indoors, but their vivid color is reason enough to keep them around.

Pet Safety

Pet safe according to the ASPCA.