| Subject | Date Asked | Expert |
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| 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 ...
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| 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 ...
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| 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. ...
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| 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 ...
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| 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 ...
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| 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), ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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: ...
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| 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 ...
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| 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. ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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. ...
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| 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 ...
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| 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) ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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. ...
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| 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 ...
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| 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 ...
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| 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 ...
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| 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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