Xtremehorticulture

Leaves Burning Up on Cherry Tomato Plant in Container

This is not the readers tomato plant. These are some leaf spots on tomato that were never identified but probably diseased. Make sure your leaf scorch is not a disease problem. Q. Hi, I just read your gardening article in the Summerlin South View paper and thought I would take a shot at sending you an email with some concerns I have with my tomato plants. I moved down here a year ago from MN and was an avid gardener up there.  Down here?  It’s a different story.  I have cherry tomato plants on my patio.  Not always in direct sunlight, but I water every day.  They seem like the leaves are burning up on the plants and the fruit has tapered off.  Any suggestions or ideas?  If you aren’t able to answer this, can you point me int he right direction please?  A. I dont know how you prepared your soil for the container but that is important. So make sure it is a good quality soil if you prepare it yourself or buy it in bags. Tomato production tapers off when temperatures consistently stay above 95F. Tomatoes and many other vegetables do not set very well under high temperatures. As temperatures drop, they will begin to set again.Vegetables that set fruit will need at least 6 hours of strong sunlight every day.   Morning sun is preferable to afternoon sun because usually afternoon sun also means a hotter microclimate. Direct sun on containers can fry a soil, particularly if the container is small, single-layered, dry when it gets the direct sunlight and dark colored. I would double pot containers (one container inside another) to help reduce direct sunlight on the growing container. Put the plants in direct sunlight in the morning hours, make sure you use a good soil each time you plant and modify it with good compost.

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Cukes Yellowing and Deformed and Beans Not Producing

Royalty Purple Pod Bush bean growing at The Orchard Q. I am a fan and follow your column religiously. I have planted a garden for the first time this year. Out of three tomato plants two gave a good yield, the other had blossoms but nothing. The cucumber plants are growing like crazy, and have a bumper crop of cukes, but now they are turning yellow, and some are deformed. The leaves are turning yellow, and there are hundreds of these tiny little flies all over. I have sprayed with water but they come right back. The string beans have tons of blooms, but no beans, even though the vines are growing like crazy. My dill didn’t make it. I have some sorrel, and the basil did well. My strawberries gave three or four little berries, and that was about all. Dragon Tongue bush bean growing at The Orchard. Very susceptible to crown rot by the way.             I need and would like to take some classes, if I could find the time, but my husband has dementia, so I am kept quite busy. If you could shed a little light on my problem I would appreciate it. Do you think I should tear it all out, and start to get ready for Fall planting? A. I am sending you a copy of Sylvan Witwer’s vegetable production book. He was retired from Michigan State University and was a celebrated horticulturist and vegetable scientist living in Overton, NV, after retirement. He has since moved to Utah. I would read through this and follow his planting guide for time of year for planting things. It is pretty hot right now for alot of things to set fruit. Many have trouble setting fruit when tempertures top 95 to 100F. Your beans are out of season now. Start ripping out the things that are not producing or producing pooly. Reamend those spots with compost, a GOOD compost. Good composts are expensive. Use a preplant fertilizer at the time of planting  high in phosphorus and mixed with the composted soil where you plant. If you are organic, use bone meal or equivalent high in phosphorus. Variety selection is important. Record which varieties worked for you and which did not. If you plant at the right time, your beans and cucumber production should be better. Crooked cucumbers. Generally, misshapen fruit are the result of stress or poor pollination. Poor pollination (cukes require about 8 to 10 visits by a bee) result in crooked cucumbers. However, fruit shaped like a lady’s figure may be the result of drought during its development or not enough visits by bees. As temperatures get hotter, bees are less efficient as pollinators. They spend alot of their time and energy trying to cool down their hives or homes. We have to rely more on our native pollinators like the leafcutter bee.   So poor pollinations can cause crooked, misshapen and yellow cukes to form. As temperatures drop and if you keep your plants alive and healthy, you should see your production pick up again. However, replanting cukes from seed will also work and then you get the advantage of having younger, more prolific plants. As far as your “flies” are concerned, I am not sure what they are or if they are causing problems but if you feel they are then usually frequent applications of insecticidal soap like Safers can reduce pest problems if sprayed directly ON the insects. This means spraying UNDER the leaves as well as on top of the plants. Never spray plants when they are in bloom unless it is at dusk or a few minutes after sunrise.

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Asparagus Crowns Not Covered Deeply. Bury them now?

Asparagus started in a trench from seed and on drip irrigation at The Orchard Q. I planted asparagus crowns in March at at depth of 12 inches. They are in a pit and my plan was to cover the shoots with soil, an inch at a time, as they grew. Well, they grew rather sporadically so I didn’t want to inadvertently bury a new shoot…so I never backfilled the pit to the level of the surrounding soil. Currently, I have about five shoots (out of 12 crowns) that have ferned. The crowns are about two inches underground and about 10 inches below the level of the surrounding soil. Is it OK to backfill the remaining 10 inches at this point? Or would that damage the plants? On the watering, there’s no set schedule. Just keep the ground moist, but not too damp, at a certain soil depth, correct? A. I would slowly add the soil over time up to the correct level. The problem you have now is that the crowns have adjusted to this soil level and I would be worried that completely covering the crowns might damage what you have already. When you begin to backfill, mix in plenty of compost with the soil you are using for backfill. Asparagus started from seed and the trench is all filled in. The asparagus spears are not harvested the first year from seed. Spears are allowed to grow and fern out to help get the crowns established. Dont just use desert soil. Make sure the soil is loose and can drain easily. Remove any large rocks so that these rocks do not cause the spears to emerge damaged or interfere with their emergence. Part of the sporadic emergence, I would guess, would have been your watering or how the soil drained. Asparagus loves to grow along streambanks or irrigation canals. It is an oasis plant so to speak and loves the same environment as palms, grapes, figs and even pomegranates. I hope this helps.

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Prune Out All Dead Areas of a Bottlebrush?

Q. I have a Bottlebrush shrub with a dead area. My question-What would be the best course of action to improve the condition of this shrub, pruning out all dead areas, then cutting it back? Bottlebrush A.  On your bottle brush I would guess this is either lemon or Scarlet bottlebrush. Depending on the bottlebrush it can get anywhere from 15 to 25 feet tall. You can train it as a large shrub if you want or small tree. This is an Australian plant that is not really considered a desert plant. However, they are typically fairly drought tolerant which just means they can survive periods of time with little water and recover when water is reapplied to them in sufficient quantities. They don’t particularly like desert soils and have a tough time in our alkaline soil environment. For this reason they tend to go yellow which is chlorosis most likely from a lack of available iron. They also would rather be growing in soils heavily amended in organic material such as compost at the time of planting. They will also grow better in a wood mulch, not rock mulch. To correct iron deficiency apply an iron chelate to the soil in early spring or late winter. You can do it now and still get some response from it. The best iron chelate for the job is iron EDDHA (check the ingredients label on the label). You can spray the foliage with an iron solution several times and get a similar result but the soil application is much more ineffective and efficient. Another bottlebrush showing extreme chlorosis in rock mulch You will have to do this every year particularly if you continue to grow it in bare soil or rock mulch. This plant should be fertilized in January with an all-purpose fertilizer for trees and shrubs as well. You should make a determination about whether you want it to be a shrub or tree. I like them better as small trees. If you decide to keep it is a tree then prune at the soil level so that you have 3 to 5 major trunks originating from the soil surface. Remove everything else and keep that area under the tree free from new suckers. Remove any broken or crossed limbs. After you have fertilized this tree with an all-purpose fertilizer and iron for the next two years, then begin to work on developing the architecture of the trees canopy.

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Early Mid and Late Peaches for Season Long Production

Q. I live in the Mesquite area (1800 ft elevation) and was looking to plant 3 differant varieties of peach’s that would not ripen all at the same time. Would also appreciate some advice on when to plant them and where I might obtain them should you recommend bare roots.  The eye-popping visual of Indian Free peach. Flavor is incredible as well when it is grown in the desert. A. It is hard to predict which peach trees will be available for you to purchase to help you plan. I can make recommendations but these trees may or may not be available. Off of the top of my head, I would probably pick a yellow peach, a white peach for sure. Something like May Pride, Babcock and Indian Free. If you look at my downloadable recommended variety list it will tell you which are early, mid and late peaches. http://xtremehorticulture.blogspot.com/2011/10/recommended-fruit-trees-for-southern.html You can also look at varieties posted on Dave Wilson Nursery at http://www.davewilson.com/br40/br40_trees/peaches.html

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The End of Ramazan. How Did I Do?

Children’s kite landed on our roof. Just like in Kabul they children fly kites here on windy days. Ramazan, or Ramadan in Arabic, is over. Today, Sunday August 19 is the official end of Ramazan and the beginning of a celebration called Eid. Some Afghan friends estimate that about 80% of the population in the cities probably fasted during Ramadan. In the rural areas it was closer to 100% excluding children, the elderly and the sick. Also women who menstruate are also excluded for three days during that period of the month. I have to admit it was tough when those temperatures hit 110F and above. Ramazan moves around on the calendar so it is not always during the peak summer months. I have to admit it was much easier when the day time temperatures were closer to 100F which fortunately was fairly often which was unusual here. Afghan local tomatoes. Yes, they are as good as they look.  How did I do? I came to a crisis point. One Afghan woman asked me in a rather impatient tone why I was fasting. She actually seemed like she was offended. I told her that I wanted to find out what my staff was going through. How could I know what I could ask them to do or not to do if I did not understand their situation. Her gaze softened. Her face turned to one of shock almost. She had  never considered this as a reason why someone might do this. Once she understood my motives she became a good friend but she was distant until she understood the Why. This also caused me to think through my reasoning and the fasting restrictions I had put on myself. If I wanted to understand what they were going through, couldn’t I just do it for a couple of days, understand the hardship, and break the fast for myself? I could. Would I understand the long term effects that fasting for a month had on my staff? Probably not . But certainly there was no reason for me to wait for the Mull Local higher end retail market. The low end is at thebazaar. ah to give his prayer some time around 7 pm to break my fast. I was not Muslim and I didn’t need to live by this conduct. So I would break my fast after they went home for the day and I was alone…usually around 6 pm. Did I need to get up at 230 am and eat and drink so I could start fasting when the Mullah gave his prayer at around 430 am? No. So when I got up at 5 am i belted down my cup of java and then began my fast. Water and food. The time of Eid is a time when family and friendships are renewed. The first day family visited each other. Food, massive amounts of good food they could or could not afford, was laid on the table. Candies, fruits, vegetables, meat,… it was all there. The second day close friends would visit other close friends. And the third day everyone joined in. It is a special time for children. Almost like our Halloween without costumes, children visiting and given candy and goodies at each of the houses. I have been invited to two homes so far on tomorrow. I feel honored. It is the second day of Eid. I have close friends. I feel blessed.

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Where Do I Get Pheremone Traps?

Q. Thank you. I have learned a lot from you. Thank you for all your newsletter. I hope that you continue to do all the good work. Do you know where I can get pheromone traps for insects that cause damage in our area and also for thrips that damage nectarines? A. Try Peaceful Valley at http://www.groworganic.com/weed-pest-control/organic-pest-control/insect-lure.html             Pheremone traps can be used to identify what insect problems you have in your backyard orchard and when to spray. Commonly we use them for peaches, nectarines, apples and pears. You will want a trap for each insect and about three or four lures for each trap since they have to be replaced regularly. You will replace the lures about every 4 to 5 weeks until harvest then you can stop.             There are no traps for thrips. For thrips you will need Spinosad biological insecticide which you can get from local nurseries. The label may not say spinosad but may say something like borer, bagworm control. You may have to look at the ingredients to see the spinosad.

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Emerald Ash Borer in Southern Nevada?

Emerald ash borer damage toGreen ash. From Wikipeida. Q. Each summer when I vacation I note the westward movement of the Emerald Ash Borer, now in Eastern Nebraska.  Is it safe to assume this menace will make its way to Nevada and, if so, is there any defense against its damage?  It seems that Ash trees make up a large portion of the urban canopy here, many of which are already stressed by lawn removal.  Do you anticipate a problem?  A. There is a good chance it will not reach southern Nevada and become a problem. It is currently restricted to lower Canada and the northern tier states extending as far south as Missouri as far as I can tell. Our climate may not be favorable for its spread. But we will not know until it gets here and it will get here. Also the ash trees it favors seems to be northern zone ash trees. Let’s keep our fingers crossed on this one. http://en.wikipedia.org/wiki/Emerald_ash_borer

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When to Add Compost and How Much?

Compost being made by Ponderosa Dairy in Amargosa Nevada by the windrow method Q. I hope you remember me from the last time you were in Kingman teaching.  I am a Master Gardener.  My question involves composting in the home garden for spring planting.  There seems to be no definitive answers as to when is the best time to add compost to the garden, and exactly how much compost to apply.  I hear that it may be better to apply the compost before the first frost so that it has time to break down before spring planting, and then again I hear that you should add it maybe a month or so before you plant.  The latter is normally the approach I take.  So far, so good, but can you share your thoughts with me on these two topics?  Thanks. A. I do remember you, Ron. Regarding the compost, I usually look at the color of the soil to determine how much compost to add. For instance, a dark rich soil that crumbles easily will need less compost than one which is hard to dig and does not crumble easily. A well prepared vegetable bed should be so friable that you can dig it nearly with your hands, unaided by a shovel. This kind of soil structure we call “crumby” like cake crumbs. Compost being added to the vegetable plots at The Orchard in North Las Vegas Once we achieve this state in a vegetable garden soil we just need to replenish the organic matter which was lost during the growing season. Generally we figure that we lose about 1/3 of our organic matter content of our soil each year. So the first year it is 1/3 of our total organic matter content. The second year it is 1/3 of our remaining organic matter content, etc. So you see it will not run out in three years to zero. It will continue to diminish annually but at a different rate as the total amount of organic matter diminishes. When preparing a raw (never amended) desert soil for a garden it will take about three years of applying a heavy amount of compost to the soil each year. These applications of compost must also be accompanied by growing vegetables in it. Just putting a compost into a soil and doing nothing else and waiting for three years will accomplish absolutely nothing. Water and microorganisms must be in the mix as well. I like to compare it to making bread or a cake. You can add all the dry ingredients to a bread or cake mix you want but without adequate liquid they will sit there and do nothing. In the raw desert soils of the Las Vegas Valley we have less than 1/10 of 1% organic matter. That is amazingly low. In other rawvdesert soils the organic matter may reach 3 /10 or 4/10 of 1%, still not much. We want our soils to get to 5 to 8% organic matter. This is 50 to 80 times higher amounts than we have. To achieve this I like to add a minimum of 50% compost to our raw desert soils. I would even push it higher, closer to 75% the first year. Every time the soil is prepared for a new planting, organic matter or compost should be added. It does not matter the time of year in the warm climate of Las Vegas. In colder climates when soil temperatures drop into the 40’s, most compost will sit there and not do much. As soon as the soil temperatures hit the mid 50’s the microorganisms will kick in and start to work. Yes, this is my foot on top of a desert soil typical of what we would use for vegetable production. It is modified heavily with compost over a three year production cycle. Compost by definition has finished its decomposition. It is then ready to release all the goodies that was built up into it during the composting or rotting process. So if a compost is a finished compost it will not continue to decompose. This is not true of unfinished composts or manure. These will continue to “rot” or decompose and they create their own heat when they do so and are piled together into a pile. Heat builds in the center of the pile to over 160F which is what you need to start killing weed seeds and bad plant pathogens. So add a finished compost every time you plant. The amount varies with the color of the soil. Darker, rich soils need less than lighter colored less well developed garden soils. But if you add compost every time you plant and you continuously garden for three years in it, then the garden soil will be sustainable with small amounts of compost every time you plant. I hope this helps.

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Fruitless Olive Tree Has Fruit!

Olive flowers Q. I read a small article on line that you wrote about “Fruitless” olive trees. We just had two new 36″ box “Fruitless” olive trees planted in our front yard.  We noticed about a dozen green olives growing at the top areas of the trees. Our landscaper told us that even “Fruitless” olive trees can get “Some” olives, but not enough to be a problem or a mess.  We have not paid him yet, and we are wondering if this is possible; or do “Fruitless” olive trees always have “0” fruit?  Should we feel comfortable with what he is saying?, or will these trees eventually end up producing a large quantity of olives ? We are currently in desperate need of someone with your knowledge. Olive tree with small number of olive fruits set A. Robert passed this on to me . . The term ‘Fruitless’ is a bit of an anomaly. . .There are a couple varieties of Olive that due to quirks in their botany do not consistently produce olives . . If the variety is either ‘Swan Hill’ (the most effective fruitless and pollenless variety), Majestic Beauty, or  Wilsonii then the chances of no fruit about 85% of the time is expected . . These three varieties have years of track record supporting the premise they are ‘Fruitless’ . . . I can only assume a reputable landscaper and their nursery supplier would only use one of those three varieties and this first year is one of the few years out of their lives when the stars align and some fruit is formed . . I would also equate that regarding many crops the terms like ‘seedless’ is not absolute; in the case of citrus ‘seedless’ means the average number of seeds is less than 1.5/fruit . . . Olive fruits forming from the olive flowers If the landscaper used another variety please let us know and we will research the background of that variety  Good luck, and let’s hope this will be the one year in 8 or so that some fruits have formed . . Respectfully, Terry Mikel There is one more possibility. These olives are grafted or budded on to an olive rootstock. If the olive rootstock has taken over and “beat out” the budded fruitless type it is possible that it will be a fruitful form. There is no way to really tell unless you can see that this happened at the bottom of the tree where the grafting or budding was done. Because this happened at the nursery, the landscape company would know nothing about that. And the nursery which was growing the tree, since its labor is generally unskilled, would not have known it either. If you see an ever increasing amount of olives coming from the tree in the future you might elect to have it replaced to remove future problems….or…. learn how to brine olives or make oil!

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