Archive | November 2012

Cactus Do Need Water

If depriving cactus of light is the worst thing you can do to it, not watering it is the second worst. For the uninitiated, I think this is the way the reasoning goes: cactus live in the desert; deserts are dry; therefore this cactus can stay dry and doesn’t need water. Nothing could be further from the truth. Cactus can go for extended periods without water, certainly, but they do need to be watered. A cactus planted in the ground is able to find whatever moisture might be lurking in the dirt and can even absorb some moisture out of the air. Cactus planted in a pot and perhaps put in the house obviously can’t do that. While cactus can survive without water, at least for a while, they will thrive with some water.

So here is what I do. In the summer I water at least once a week, more if it has been oppressively hot. I water enough that the water drains through and out the bottom of the pot. You’ll want to do that so that all the roots from top to bottom get some water and not just a few of the roots in the top of the pot. The trick is to make sure the drainage is good and the pot doesn’t sit in the run-off water that might collect in a saucer. That’s the thing with cactus: they like some water but don’t want to stand in it. Water well and then let them dry out.

The next problem is, of course, how do you know when they have dried out? Over time it is just something you get a feel for, but one thing you can do is go to the grocery store and buy a package of those bamboo skewers and use one as a guide. Poke it all the way down into the dirt in the pot and see if it comes back damp and with bits of dirt sticking to it. If it does, you might let it dry out some more before the next watering. If you live in a humid area that gets lots of rain, the rain will take care of a lot of the watering for you. Cactus and succulents do love a good rain shower. The trick, again, is to not let them stand in the water afterward and give them plenty of time to dry out.

In the winter you will want to cut back on the water, but they will still need some.

Now, all of that having been said, if here is ever any question, you will want to err on the side of dry. Just don’t expect them to do well without any water at all! Occasionally you may rot one; it happens. I have lost a few over the years, but that’s how you get the hang of it.

You’ll see.




Mammillaria. One of my many unidentified mammillarias. Like most of them, this one is making a halo of blooms.



I have not been able to identify the variety of either of these euphorbias. Their stems are similar, but the one, as you can see, does not have the flat, fleshy leaves that the other one does. And those little pink things on both are flowers, believe it or not! While the flowers may not be showy, the shape and design of the plants gives them appeal.

Matucana madisoniorum

Matucana madisoniorum is one variety I don’t see very often.


These are growing and seem healthy in spite of the blemishes on the bodies. You can see two more buds forming on the other cactus. I am not sure what caused the scarring. That is something I am still learning about.

Mammillaria nejapensis; Notocactus haselbergii

Mammillaria nejapensis. I bought this cactus just this year. I like the contrast of the bright green body with the hairy areoles and light-colored spines. The flowers are also a little different with the stripes of red against the white. These flowers last a couple of days before closing.

Notocactus haselbergii. I thought these blooms never would pop open! They have a waxy finish on the petals, so they will stay open a few days. The waxy blooms seem to last longer than the more fragile, softer petals.

Euphorbia milii; white, red, yellow

Euphorbia milii by its common name is called crown of thorns, or sometimes forever plant, because it will bloom for a while, stop, and then bloom again. So it blooms off and on all year. Mine all happen to be the smaller varieties, and I have the white and red, as well as a yellow one with an elongated, pointed leaf.


Euphorbia milii, white blooms.


Euphorbia milii, red bloom.



Euphorbia milii, elongated leaf, yellow bloom.