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What to do with moon cactus pups is a question every moon cactus owner eventually asks.
These little offshoots, also known as moon cactus pups, start popping up at the base of your plant or right along the sides of the rootstock.
And trust me, knowing what to do with moon cactus pups isn’t complicated once you understand how they grow.
In this post, we’ll cover exactly what to do with moon cactus pups, when to remove them, how to propagate them, and how to care for them so they thrive.
Let’s dig in.
What to Do with Moon Cactus Pups: The Basics
When you’re wondering what to do with moon cactus pups, the first thing to understand is that these pups are essentially baby clones of the colorful top cactus.
Moon cactus pups grow from the scion, which is the bright red, orange, or yellow ball on top of the green rootstock.
Unlike the rootstock, these pups don’t have their own chlorophyll, so they can’t survive on their own without grafting.
1. Remove Moon Cactus Pups for Healthier Growth
What to do with moon cactus pups often starts with removal.
If you leave too many pups on the plant, they’ll compete for energy and nutrients.
This can weaken the main moon cactus and slow down its growth.
So what to do with moon cactus pups is to gently twist them off or use a clean, sterile knife to cut them away.
It’s best to remove moon cactus pups when they’re at least a quarter to half an inch in size.
That way, they’re big enough to handle the process.
2. Let the Cut Ends Callus Over
Once you’ve removed your moon cactus pups, don’t plant them right away.
What to do with moon cactus pups after cutting is to let the wound dry and form a callus.
Place your moon cactus pups in a dry, shaded spot for about three to five days.
This callusing step is crucial because it prevents rot when you eventually plant or graft them.
Skip this, and your moon cactus pups might just turn to mush.
How to Propagate Moon Cactus Pups Successfully
If you’re asking what to do with moon cactus pups to grow more plants, propagation is your answer.
But here’s the catch: moon cactus pups can’t survive on their own because they lack chlorophyll.
So what to do with moon cactus pups is to graft them onto a suitable rootstock.
1. Choose the Right Rootstock for Moon Cactus Pups
What to do with moon cactus pups starts with picking a hardy rootstock.
The most common choice is Hylocereus, also known as dragon fruit cactus.
This green cactus is vigorous, grows fast, and accepts moon cactus pups easily.
You can also use other columnar cacti like Myrtillocactus or Trichocereus.
Make sure the rootstock is healthy, thick enough, and actively growing.
2. Cut and Match the Vascular Rings
When you graft your moon cactus pups, cut the top off the rootstock with a clean blade.
Then, slice a thin layer off the bottom of your moon cactus pup.
You want to expose the inner vascular ring, which looks like a small circle inside the cut surface.
Align the moon cactus pup’s vascular ring with the rootstock’s vascular ring.
Press them together gently but firmly.
This alignment is the secret to successful moon cactus pups grafting.
3. Secure the Graft with Rubber Bands or Twist Ties
After placing your moon cactus pups on the rootstock, hold them in place.
You can wrap rubber bands vertically over the top of the pup and under the pot.
Or use grafting clips if you have them.
Keep the pressure gentle enough not to crush the tissues but firm enough for contact.
Leave the securing in place for about one to two weeks.
4. Provide Warm, Indirect Light After Grafting
What to do with moon cactus pups after grafting is to place them in a warm spot.
Avoid direct sunlight during the first week.
Bright, indirect light is perfect for helping the graft heal.
Water the rootstock lightly, but don’t wet the graft site.
Once you see new growth on your moon cactus pups, you know the graft took.
Caring for Moon Cactus Pups After Propagation
Once your moon cactus pups are grafted and growing, they need consistent care.
What to do with moon cactus pups in terms of ongoing care isn’t hard, but it does require attention.
1. Water Moon Cactus Pups Sparingly
Moon cactus pups, like all cacti, prefer the soil to dry out completely between waterings.
Overwatering is the number one killer.
Water deeply but infrequently, especially during the growing season in spring and summer.
Cut back significantly in winter when growth slows down.
2. Give Moon Cactus Pups Plenty of Sunlight
Your grafted moon cactus pups need bright light to thrive.
A south or west-facing window works great.
If natural light is low, consider a grow light.
Just avoid scorching afternoon sun for young moon cactus pups.
Gradually acclimate them to stronger light to prevent sunburn.
3. Fertilize Moon Cactus Pups During Active Growth
Feed your moon cactus pups with a diluted cactus fertilizer every four to six weeks.
Do this only during spring and summer.
Use a balanced formula like 10-10-10 diluted to half strength.
This promotes healthy rootstock growth and keeps your moon cactus pups vibrant.
Common Mistakes When Handling Moon Cactus Pups
Even experienced growers sometimes mess up when deciding what to do with moon cactus pups.
Avoid these pitfalls to keep your plants happy.
1. Not Letting Moon Cactus Pups Callus
Skipping the callusing step is a huge mistake.
Fresh cuts on moon cactus pups invite bacteria and fungi.
Always let them dry for several days before grafting or planting.
2. Grafting Moon Cactus Pups That Are Too Small
Tiny moon cactus pups might not survive the grafting process.
Wait until they’re at least the size of a pea or smaller than a dime.
Larger moon cactus pups have more energy reserves.
3. Overwatering Grafted Moon Cactus Pups
Too much water causes rot at the graft union.
Keep the soil barely moist until the graft heals.
Then resume normal cactus watering habits.
So, What to Do with Moon Cactus Pups?
What to do with moon cactus pups is to remove them carefully, let them callus, and graft them onto a fresh rootstock.
You can also use moon cactus pups to experiment with different rootstocks or even stack multiple pups.
Just remember that moon cactus pups can’t survive alone, so grafting is essential.
With patience and proper care, you’ll have a whole collection of colorful moon cactus pups in no time.
Happy growing, and enjoy your new little cactus babies.