Cactus/Questions
| Subject | Date Asked | Expert |
| Saguaro Cactus | 7/11/2007 | Greg Simpson |
| Q: We have a 12' foot saguaro that is getting brown scabs on it, is there anything we can do about ... A: Pat, If that is the case, then the spots will be on the south or west side of the plant. If there ... | ||
| moon cactus | 7/9/2007 | Greg Simpson |
| Q: my moon cactus use to have a beautiful yellow and orange top but it has shriveled up and turned ... A: Sheena, The cactus on top is dead. It is actually a different type of cactus that has been grafted ... | ||
| orange rot help | 7/9/2007 | Greg Simpson |
| Q: It is now winter here in tasmania, australia. Pretty wet and cold. I noticed orange/rust coloured ... A: Chris, I am not too familiar with that type of rot, but I did find some thing that might help. ... | ||
| Euphorbia hermentiana is sick | 7/9/2007 | Greg Simpson |
| Q: I purchase this from the boyce thompson arboretum and im attached TO IT. About 5 months ago my dogs ... A: Sean, One cup per month may be enough in the winter, but in the summer (if it is outside) it will ... | ||
| Saguaro | 7/9/2007 | Greg Simpson |
| Q: Getting different answers to how big an area is need to plant a 20 foot cactus with at least one ... A: Jane, What you need to consider is that a saguaro (if that is what you have) get very big and very ... | ||
| broken catci | 7/8/2007 | Greg Simpson |
| Q: My very tall cacti plant broke in thirds, is there any way I can save this plant, and what do I need ... A: Toni, The best option for you is to replant the broken pieces in the same pot (or another one), ... | ||
| staking a Saguaro | 7/8/2007 | Greg Simpson |
| Q: We just purchased a 20' Saguaro with 5 arms and had it replanted in our yard. The landscapers used ... A: Mary, That will depend on how deep your saguaro was planted. Typically the ones you see with boards ... | ||
| barrel & Mexican fencepost | 7/7/2007 | Greg Simpson |
| Q: I recently had landscaping done and had these two added to my yard 2 months ago. I live in Phoenix. ... A: Greg, I also live in the Phoenix area, so I am familiar with the weather. Golden barrel and Mexican ... | ||
| indoor cactus garden dying | 7/7/2007 | Greg Simpson |
| Q: I thought it would be a good idea to put my indoor cactus garden outside on my windowsill for awhile ... A: Evan, Unfortunately, you may be right about that Arizona heat. Indoor plants, even cacti can not ... | ||
| Yellowish Brown Barrel Cactus | 7/7/2007 | Greg Simpson |
| Q: I have three Golden Barrel Cactus. They are not as bright green as they have been in the past. ... A: Paul, Golden barrels are especially susceptible to heat and intense sun. The rain may have ... | ||
| indoor aloe vera | 7/6/2007 | Greg Simpson |
| Q: I just recived my first aloe vera plant from my friend as a birthday gift and me and my friend no ... A: Julia, Actually the lack of light will affect it more than the temperature. It will need at least ... | ||
| Weeding a prickly pear cactus | 7/6/2007 | Greg Simpson |
| Q: I have a large, fairly dense, 16 year old patch of prickly pear cactus that is being infiltrated by ... A: Diane, I had no idea what a red sorrel was, so I had to look it up. I found some info at: ... | ||
| catus | 7/6/2007 | Greg Simpson |
| Q: I have a catus about 4 years old and now I think it is dyeing,can cat pee kill a catus? what can I ... A: Doris, Not sure about the cat pee, but just water it very well when the soil is dry and keep it out ... | ||
| outdoor yucca | 7/5/2007 | Greg Simpson |
| Q: I was reading an answer you gave to care of outdoor yucca plants. You talked about over watering. ... A: Wendy, That depends on the type of yucca you have. Some are more drought resistant than others. ... | ||
| aloe vera | 7/4/2007 | Greg Simpson |
| Q: I have just noticed that the roots of my potted aloe vera plant have rotted away, though the plant ... A: Sandy, No, do not put in water. Succulent plants will not root that way. If the stem of your plant ... | ||
| Barrel Cactus shrivelling at top | 7/4/2007 | Greg Simpson |
| Q: I have a pot with three Barrel Cactus. The tallest, about 3 feet and the next tallest slightly ... A: Jo, Damage to the apex of the plant is usually caused by either cold damage or sunburn. Was your ... | ||
| sunburned aloe vera | 7/4/2007 | Greg Simpson |
| Q: My aloe veras were left outside too long in the heat and got sunburned.Turned a nasty brown. Will ... A: Deb, That depends. Are they shriveled up? If so, probably not. Resist the urge to water them ... | ||
| Golden Barrell problem | 7/3/2007 | Greg Simpson |
| Q: I have a white fiborous growth on the top of the cactus. can you identify and advise treatment. ... A: Phil, If it looks like this: http://www.ruthbancroftgarden.org/pages/2003-09-PlantHighl.html it ... | ||
| Aloe Vera Cactus | 7/2/2007 | Greg Simpson |
| Q: Well first off, I have an aloe vera plant that I raised in my bio class for the whole 06-07 school ... A: Cody, It sounds like it is either under watered or may have some root damage. The following website ... | ||
| I want to get rid of my cactus | 7/1/2007 | Greg Simpson |
| Q: I have a 22 year old cactus in my backyard that is starting to become more trouble than it is worth. ... A: Stephen, It sounds like you have a Cereus peruvianus. That is a very common cactus, but also very ... | ||
| prickly pear cactus | 7/1/2007 | Greg Simpson |
| Q: I've heard that you can take cuttings from one prickly pear cactus to grow new ones. Is this ... A: Betsy, Your in luck, because prickly pear is one of the easiest plants in the world to propagate. ... | ||
| aloe vera outside | 6/21/2007 | Greg Simpson |
| Q: I recently purchased a good sized plant that the amish greenhouse guy said was an aloe vera ... A: Nellie, Based on your description, you plant does not sound like an Aloe. It sounds more like a ... | ||
| Strange Aloe Growth | 6/20/2007 | Greg Simpson |
| Q: I have an aloe plant that I got last fall from a plant he had. It has since then grown quite a bit ... A: Leigh Ann, Sorry for the delay in getting back to you. It sounds like you have a fungus (mushrooms) ... | ||
| cactus shrivelling | 6/20/2007 | Greg Simpson |
| Q: I bought a Myrtillocacus geometrizans crest "Dinosaur Back" cactus from the Desert Botanical Garden ... A: Coleen, Sorry for the delay in getting back to you. Based on your description of the symptoms, it ... | ||
| Euphorbia Eritrea | 6/19/2007 | Greg Simpson |
| Q: I bought a euphorbia eritrea about 3 weeks ago. In the garden centre each branch had a crest of ... A: Joanna, Sorry for the delay in getting back to you. You are on the right track. Euporbias do drop ... | ||
| What's wrong with my beloved barrel cactus? | 6/17/2007 | Greg Simpson |
| Q: I only water my big (12" diameter x 14" tall) cactus once a month, but it's looking much lighter ... A: Justine, Sorry for the delay, I have had no internet service for almost a week. It is very possible ... | ||
| old jade tree in need of expert assistance! | 6/15/2007 | Greg Simpson |
| Q: My office has a jade tree that's about 30 years old and probably 5 feet high. In it's former life ... A: Gina, Sorry for the delay, I have had no internet service for almost a week. Unfortunately, while I ... | ||
| old aloe master plant | 6/15/2007 | Greg Simpson |
| Q: I inherited an old aloe "Mexican master plant" my friend called it. It is huge about 2' tall. the ... A: Karen, Sorry for the delay, I have had no internet service for almost a week. It sounds like your ... | ||
| Replanting Echinocereus Gentryi | 6/13/2007 | Greg Simpson |
| Q: What is the easiest way to replant an Echinocereus gentryi? Mine is 42 inches tall and has three ... A: Tom, If you have a Echinocereus Gentryi, it is twice as big as they normally get. If your not sure ... | ||
| Broken aloe | 6/13/2007 | Greg Simpson |
| Q: On 6/4/07 my aloe plant top leaves separated from the roots and fell to the floor. I have had this ... A: Helen, Generally speaking, Aloe's do not lose their leaves unless they are dying. It is also next ... | ||
| When to unbind Ocotillo cactus | 6/12/2007 | Greg Simpson |
| Q: Greg, I am caring for a recently transplanted Ocotillo cactus. It is approximately five feet in ... A: Gary, Actually, you can remove it immediately. You do need to spray off the plant with water every ... | ||
| Saguaro | 6/11/2007 | Greg Simpson |
| Q: I have a saguaro Catus that is decaying from the bottom of the catus is their any thing I can do to ... A: Jon, Unfortunately not. The reason is that a saguaro's main stem is too thick (and heavy) to be ... | ||
| Mexican Fence Post | 6/10/2007 | Greg Simpson |
| Q: Greg, One of my Mexican Fence Post looks like it has been dusted with pencil shavings. It has ... A: Craig, That sounds like it could be scale insect. It is a sucking insect that can damage your ... | ||
| Jade Plants | 6/10/2007 | Greg Simpson |
| Q: I am moving to outside Tucson area in a few weeks (slightly higher elevation at about 3000 ft)from ... A: Lenora, Morning sun would be good, but you also have to consider the cold in the winter. Tucson can ... | ||
| Jade plants | 6/10/2007 | Greg Simpson |
| Q: i just had a few questions for you. How fast do they grow? (How many leave pairs) And how much ... A: Brian, How fast do they grow? They grow faster than most cacti, but slow enough that they won't ... | ||
| Severely damaged cactus | 5/24/2007 | Greg Simpson |
| Q: I have an eight year old cactus, 3 ft wide, 3 ft tall, potted. I don't know what type it is, but it ... A: Elaine, It sounds like you actually have a Euphorbia, which is similar to a cactus, but isn't one. ... | ||
| Aloe Vera | 5/24/2007 | Greg Simpson |
| Q: I have an aloe that did great indoors all winter long, and this season, I took it outside. Almost ... A: Travis, If it did fine all winter indoors and started to decline outdoors, it is most likely ... | ||
| crown of thorns | 5/22/2007 | Greg Simpson |
| Q: I've had a crown of thorns plant for approx 3-4 yrs. It flowered for the first 1-2 and never again. ... A: Anthony, Plants flower in response to many stimulus and for some reason the conditions have not ... | ||
| Yellow Cactus | 5/22/2007 | Greg Simpson |
| Q: I've had these cactus for over 30 years. I brought them with me when I moved to Florida from ... A: Jeane, Most likely it had to do with sunlight. There are probably 2 reasons, one is that the sun is ... | ||
| repotting agaves | 5/20/2007 | Greg Simpson |
| Q: Greg, What is the general rule for transplanting Agaves? I am moving them from nursery plastic pots ... A: Steve, Overwatering means that the soil stays wet. This is deadly to more than just cacti & ... | ||
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Greg Simpson
Top Expert on this page
Expertise
I can answer questions regarding planting, transplanting, care, propagating, identification and general information. The questions can be about cacti and other succulents from North and South America and Africa.
Experience
Collecting cactus and succulents since 1974.
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