Tag Archive for: signs

Sunburned Citrus: Common Signs of Sun Damage

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The Sunburn Experience: Not Just for Humans

Have you ever had a sunburn? Maybe a better question is, “Who hasn’t?”

Well, did you know that many plants get too much as well?

Sunburned Citrus: A Common Concern

On a recent visit to a client who was worried about her newly planted citrus trees.

new citrus trees planted in pots.

Sunburned Citrus

The Leaf Yellowing Dilemma on Citrus Trees

This particular client has a large courtyard with several new citrus trees in pots. Her citrus trees, planted in spring, showed yellowing as summer progressed.

sunburned citrus leaves

Now yellow leaves can indicate a number of different problems.  In this case, the diagnosis was rather simple – her citrus tree has a case of sunburn.

Common Signs of Sunburned Citrus and Other Plants

– The areas of the leaf that are yellow are in the center and NOT along the tips or edges.

– Often, the yellow areas begin to turn brown.

– Signs normally occur in the summer months.

– The sunburned leaves are usually located on the south and west-facing parts of the plant.

– This particular citrus tree is in an area that receives reflected, afternoon sun.

Citrus-tree-in-container-ASU


How to Prevent Sunburned Citrus

In this case, the solution is simple. Move the citrus tree to another part of the courtyard that receives afternoon shade is all that is needed to prevent further sunburn damage. Another choice is to put 50% shade cloth on from mid-May through September.

Citrus do best when planted at least 10 – 15 ft. away from walls. Unfortunately walls absorb the heat of the day and re-radiate it out.

Avoid planting where they get the full force of afternoon sun.

Garden Travels: Urban Vegetable Garden With a Touch of Whimsy

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Buffalo, New York

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I enjoy traveling around the country, exploring gardens. Throughout my travels, I am constantly amazed at the unexpected gardens that I stumble upon. Recently, I was in Buffalo, New York for the annual GWA Conference. I arrived a few days early in order to spend time with my BGF (Best Garden Friend), Andrea who came all the way from Australia to attend. We set out from our hotel in the morning to see more of the downtown area of the city.

Buffalo Vegetable Garden Travel

It was a hot and humid day, but we were not deterred. We passed by a farmers market down the road from our hotel where fresh produce from area farms, was laid out to tempt passersby.  

Buffalo Vegetable Garden Travel

I enjoy seeing fresh seasonal produce but lament that fact that other than fresh fruit, I am limited as to what I can use without a kitchen when I am traveling.

Buffalo Vegetable Garden Travel

Most farmers markets also feature plants for sale and it’s a great way to see what grows in that area.

Buffalo Vegetable Garden Travel

After leaving the farmers market with a bag of blueberries, we continued our walk toward the lake side where we encountered a lovely urban community garden. The Learning Garden is located underneath an overpass and adjoins a park.

The garden serves as an outdoor classroom for Erie Community College.

Buffalo Vegetable Garden Travel

Three of the sides of the garden bounded by a fence, leaving an open gateway for visitors to explore the garden.

Buffalo Vegetable Garden Travel

Raised beds were filled with a variety of vegetables and herbs along with a few ornamental flowers. Tomatoes are found in almost all of the beds and this garden clearly had an Italian theme with its basil and parsley.

Buffalo Vegetable Garden Travel

Intermingled with many of the edible crops were whimsical garden signs like this one nestled within a bed of kale.

Buffalo Vegetable Garden Travel

This sign expresses the joy of gardening for me and I believe for many others as well. As you can see, they aren’t difficult to make and I may enlist the woodworking skills of my husband to make some for my own garden.

Buffalo Vegetable Garden Travel

Andrea and I took a moment to rest our sore feet while enjoying the scenery of the garden and the busy bees roaming from flower to flower.

Buffalo Vegetable Garden Travel

The raised beds followed no distinct pattern that I could ascertain – but regardless, they looked great and were obviously thriving. Vegetables were the main focus with flowering annuals such as snapdragons and alyssum adding color.

Buffalo Vegetable Garden Travel

I want this sign in my vegetable garden – do you think the neighborhood cats can read?

Buffalo Vegetable Garden Travel

A small greenhouse is located behind massive cucumber vines. My cucumber vines have never looked that good…

Buffalo Vegetable Garden Travel

I enjoy garden art made from repurposed materials, such as this ‘spoon-fork’ flower – a definite touch of whimsy.

Buffalo Vegetable Garden Travel

What do you do when you run out of room in your raised beds? Plant vegetables in fabric containers, of course!

Buffalo Vegetable Garden Travel

In a sunny corner, an unusual pair of wooden chairs sat, facing each other. What a great piece of furniture for those who enjoy good conversation, like we do!

Buffalo Vegetable Garden Travel

We spent over an hour exploring the garden before leaving. It was a completely unexpected garden discovery and one that I will remember for a long time.

Once we left the garden, we decided to search for a place to eat lunch. Did we select a unique eatery or small cafe for lunch?

Tim Hortons

Nope.

I’ve heard great things about Tim Hortons and we don’t have them where I live and they aren’t in Australia, where Andrea lives either, so we decided to eat lunch there to see what all the buzz was about.

bun club sandwich

 Okay, this isn’t the healthiest lunch, but I did get my pretzel bun club sandwich without mayonnaise and it was delicious.

cake batter-flavored donut holes

For dessert, we ate their famous cake batter-flavored donut holes – oh my, they were wonderful! It’s probably a good thing that we don’t have one nearby or my waistline would suffer greatly.

I hope you have enjoyed our Buffalo garden travel so far. You can click here to read about our adventures at the test garden filled with colorful annuals. Next up, a garden from the pages of Harry Potter!

**You can follow Andrea’s gardening adventures on her blog.

Oleander Leaf Scorch Strikes Again…

Do you have oleanders?  If so, you might have heard of a fatal bacterial disease called oleander leaf scorch that affects oleander shrubs.

This disease is slowly spreading and I have been seeing it more often when I visit clients.  

I wrote an earlier post about oleander leaf scorch, its signs and how it affects oleander shrubs, which you can view here.

Earlier this month, I visited another client whose entire backyard was surrounded by tall oleander shrubs that were quite mature.  She suspected that her oleanders were starting to show signs of oleander leaf scorch and it turns out that she was right.

oleander leaf scorch

Her suspicions began when she noticed browning of her a few of her oleander shrubs that began this spring and was worsening as summer progressed.

It’s important to note that browning of oleanders doesn’t necessarily mean that they are infected with oleander leaf scorch – browning can be caused by any number of problems from drought stress, salty soil or other excess minerals in the soil.

characteristics of oleander leaf scorch disease

However, a closer look at the foliage showed some of the characteristics of oleander leaf scorch disease with the outer leaves and tips turning brown.

This occurs because the bacteria rapidly multiply, blocking the vascular system of the plant. 

sign of oleander leaf scorch

These browning tips are also a sign of oleander leaf scorch, but this particular sign can also indicate high salts in the soil.

Even if you see only a few leaves affected, the entire shrub is infected and will die within 3 – 5 years.  Because this disease is spread by a flying insect called a sharpshooter, not all oleander shrubs in a given area may be affected as it hops from bush to bush.  However, these insects carry the bacteria in their saliva and spread it to each oleander shrub that they feed from.

While I was able to tell my client that her oleander shrubs likely were infected this disease, the only way to confirm the diagnosis was to contact her local cooperative extension office and send in some leaves from her oleanders to be tested.

If the test comes back positive, she will need to remove all of her oleander shrubs.  While they will live 3 – 5 years after being infected, they will turn brown.  The most important reason for removal is to help keep the disease from spreading to other oleanders in the neighborhood.

For more photos and a detailed description of this oleander disease as well as a suggested replacement plant for oleanders, read my previous post, “Plant Disease: Oleander Leaf Scorch”