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Black Spot on Pohutukawa

Ask the Expert:our pohutukawa tree
Ours is 3 years old, growing in purpose-built greenhouse (heated as needed). We live in South Hampshire. This past week the leaves are showing black spots. Can I assume it is actually black spot and spray accordingly? I don\’t want to kill it off after all our efforts.
Thanks Janet


Flower Shop Network Plant Expert Reply:

Yes, you most likely have a fungal pathogen. It may not necessarily be “black spot” (Diplocarpon rosae) which is usually associated with roses. These type of fungus can all be treated with a fungicide. Pohutukawa are in the greater myrtle family and most all general purpose fungicides should be safe to use.

However to be on the safe side, examine the leaves closely to make sure no insect such as psyllids or a scale is causing symptoms. If turns out to be an insect problem, use a general purpose insecticide.

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What Are The Gray Spots On My Dieffenbachia?

Ask the Expert: dieffenbachia problems
tiny round silver spots on top of leaves what is causing it???
BJ



Flower Shop Network
Plant Expert Reply:

In the first photo, you can see the gray spots that are appearing on several of the dieffenbachia leaves. Exposing dieffenbachia leaves to direct sunlight can cause issues like gray spots. Which is what it looks like to me.

In the second photo, I noticed that the leaf is wilted and may indicate that the plant is under water-stress. Under watering a dieffenbachia can cause wilting and make the plant more susceptible to light stress issues. It appear that the dieffenbachia is in a dish garden with other plants which may not be compatible in regards to light and water. I recommend removing the dumb cane (dieffenbachia) from the dish garden in to its own pot.

Place the newly potted dumb cane in a partial light or filter light and create a humid environment for the plant. Mist the plant every couple of days with lukewarm water. Once a week check the soil and water as need. Soil should be moist to the touch but the plant should not be soggy.

Keep an eye on the spots. They will not go away. Watch for any spreading of the spots. Although the spots seem to be caused by over-exposure to direct light, one of the fungal or bacterial diseases that effect Dieffenbachia could be an underlying cause. Although must fungal or bacterial issue have a reddish/brown center with a yellow halo or a different type of lesion.

Read the Caring For Dieffenbachia for more information about light, water and the pests and disease that effect dumb cane.

This plant care question was brought to you by local Salem Florists. Not in Salem OR? Use Flower Shop Network to find a real local florist near you.

Saving A Very Sentimental, But Too Tall Lucky Bamboo Plant

Ask The Expert: I have a lucky bamboo plant that I purchased 10 years ago.  It is now about 3 1/2 feet high and although I have it staked it is top heavy and difficult to keep it from tipping over.  Can it be cut back and if so, how?  I would most appreciate any advise you may offer.  This plant has a great deal of sentimental value.  it was purchased while my wife was being treated for lung cancer,  She died several months later.  I would very much appreciate any help you can offer. -Syl

Topping Lucky Bamboo

Red Line Indicates Node - Yellow line indicates where to Make Cut

Flower Shop Network Plant Expert Reply: Yes, trimming or topping lucky bamboo (Dracaena sanderiana) is definitely an option. Because your plant is so sentimental, something you may want to do is start a brand new plant with your clippings. To do this, you will need:

  • a sharp knife
  • a misting bottle
  • rooting hormone
  • clean container for topped piece
  • distilled water

Topping & Rooting Lucky Bamboo

Step 1: Find a node (raised ring on stem) at the height you want the plant to be after you top it.

Step 2: Cut about an inch above this node. Since you have a very tall lucky bamboo plant, you can make multiple cuts along the nodes. Be sure each new plant section is at least 4-6 inches long.

Step 3: Dip one, cut end into the rooting hormone, which you can find at local garden and nursery centers.

Step 4: Let this dry overnight and then place the new clipping in the new container filled with distilled water. Only a few inches is needed, but do keep the water level consistent at all times.

Step 5: Leave the old stems alone for a few days.

Step 6: After a few days, begin to mist your lucky bamboo daily to encourage new leaf growth.

Care for the old stem and the new stem the same way you always have except for fertilizing.  Wait a couple months before you fertilize the new stem. Soon you will have beautiful, thriving lucky bamboo plants, and even more in the future! These will make extra special gifts for friends and loved ones.

Related Articles:

Caring for Lucky Bamboo

Topping Lucky Bamboo

We Are Not Always Lucky With Lucky Bamboo

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What To Do: Plant Leaf Is Dripping Sap From A Tear

Ask the Expert: i have a green plant and the leave got tore

the leaves got tore and its dripping white fluid … what do i do …. Sindra

Flower Shop Network Plant Expert Reply:
Cut the leaf off at the base – where the leaf stem and the plant stalk meet. Then leave it alone. The sap will eventually stop dripping.

This plant care question is brought to you by local Columbia Florists.  Not in Columbia MO? Use Flower Shop Network’s handy directory of real local florists to find a florist near you!

Saving A Peace Lily

Ask the Expert: How do I save my peace lily?

Spathiphyllum

My peace lily’s leaves are soft and limp. Someone told m I overwatered it. I let it dry out, it did not improve. Can this plant be saved or is it too late? Debbie

Flower Shop Network Plant Expert Reply:
The plant can be saved.
Check the roots. Make sure they have not rotted and that the container has drain holes that will allows excess water to drain away from the roots.

The soil looks a little dry right now. Moisten the soil and keep it evenly moist but not soggy. You want the soil to hold water, but you should not be able to squeeze water from it. Also create a humid environment around the plant by misting the air around it with lukewarm water every day or every other day. Remove any of the yellow or brown leaves.

Make sure the plant is receiving light. However, the light source should not be beaming directly on to the plant.

Once you get the plant settle with the right conditions it should make a full recovery.

This post is brought to you by local Nashville TN florists.
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Help! My Peace Lily Has Caterpillars

Ask The Expert: I have two peace lillies. I had the two of them sitting in my kitchen sink to spray the leaves today. I noticed lots of insects that look like baby caterpilars…brown or black in color. What can I do about them, and could that be why the plant doesn’t seem to be growing? Lisa


Flower Shop Network Plant Expert Reply:
You can do one of two things: pick off the caterpillars or spray them with an insecticide. I use the Fertilome Red Spider and Mite spray. It Kills Red Spiders Mites, Two Spotted Spider Mites, Whiteflies, Mealybugs, Aphids, Thrips and Scale Crawlers on house plants and is safe to use on peace lilies and a multitude of other houseplants. It comes in a ready to use (rtu) form, so all you have to do is spray it on the plant. You can pick this product up at any local garden center. If they don’t have the Fertilome brand ask the nursery professional what they use.

As for the stunted growth of your Peace lily (Spathiphyllum clevelandii), you may need to fertilize the plants. You can use a water soluble fertilizer once a month. It is best to use a balanced fertilizer – one in which the N, P, and K all have the same ratio like 10-10-10 or 20-20-20. If you can’t find a balanced fertilizer try one in which the number are as close as possible like 9-8-5.

Make sure you are keeping your peace lily evenly moist and that it has good drainage. Keeping your moisture level correct is a big part of keeping a peace lily healthy.

Here are a few Peace Lily Requirements

Peace Lily Care: Light Requirements

[Read more…]

What To Do When Tips OF Peace Lilies Turn Brown

Ask the Expert: Tips of the Peace Lily plant

What do you do when the tips and the sides of the leaves of the Peace Lily plant start turning brown. I have a huge plant in the office and so far it is doing extremely well but the tips of the leaves are turning brown right at the very point.

Thank you for any help you can send my way. Shell

Flower Shop Network Plant Expert Reply:
You can trim the brown tips and sides off the leaves. What is more important is to figure out why the leaves are turning brown in the first place. What and sunlight are the major causes of browning in Spathiphyllum (peace lily) leaves. Make sure the plant is staying evenly moist and that sunlight is not beating directly down on the leaves. I would alos check for any signs of insects. Once you correct the problem the leaves should stop turning brown.

Peace Lily Leaves Are Drying And Turning Brown, Why?

Ask the Expert: why RE THE LEAVES ON MY PEACE LILLY TURNING BROWN

TURNING BROWN ALL OVER AND DRYING Christeen Baker

Flower Shop Network’s Plant Expert Reply:

Peace lily (Spathiphyllum) leaves can turn brown: if the water used is highly chlorinated – if intense sunlight bears directly down on the leaves – if the plant has not been kept evely moist.  Only To detyou will be able to determine which of these factors is the culprit.  To remedy the situation:

If chlorinated water is the problem, expose your open container of water to the air for 24 hours before using. Or, water your plant with distilled or bottle water.

If sunlight is the issue, move plant away from the intense sunlight.

If irregualer watering is the cause, check the plant every couple of days and water when soil begins to dry out.

With in a couple of week the plant should begin to produce new growth.

How Can I Tell If Azalea Is Dead?

Hot Pink Azalea

Hot Pink Azalea

Ask the Expert: Is it dead an azalea that lose all its leaves?
I bought this azalea in february and did very good for one month and then started to lose the flowers and all the leaves. It was inside my house in a spot with good light, so I thougt that maybe needed to be outside, but is not looking good neither. Jennifer.

Flower Shop Network Plant Expert Reply:

The first thing you need to do is check the viability of the Azalea. You can do this by testing the stems for signs of green. Take your fingernail and lightly scrape the stem. If the you see green where you scraped the stem the plant is still alive. If it isn’t green go further down the stem until you find  green. You will need to trim off any part of the stem that isn’t green.

Once you have determined that your azalea is still alive, you need to make sure it is planted in the ground or pot in a container with good drainage.  After the azalea is in its new home you need to keep it moist but not soggy and fertilize it once a month (April through August) with a slow release fertilizer.  The Azalea will do best in an area with at least half a day sun.

Side note: Anytime you receive an Azalea from a florist shop and it comes with pretty foil around it, remove the foil within a couple days. Foil is great for dressing up the  Azalea, but it doesn’t allow for proper drainage. So remove it as soon as possible.

This plant care question was brought to you by local Raleigh Florists.

How To Care For Mother’s Day Azalea

Ask The Expert: I got a Azalea Plant for Mothers Day, and I want to know if I can plant it in a flower pot instead of planting it outside because we are planing to move from the home we are now living in. I also need to know how I should I plant it in the pot.

Thank you very much Katie

Plant Expert Reply:

If you are planning on moving and want to take the plant with you, I would keep it in a pot.  I assume that the azalea came from a florist.  Typically these types of azaleas do well in a pot for quite a while and are hardy only in zone 7-10.  If it came in a basket or was wrapped in foil, I would transplant it into a better container with a drain hole. Azlaea do not like to be soggy, so drainage is essential. Use a peat based potting soil with gravel, rocks or broken terracotta pieces at the bottom of the pot.

While the azalea is in the pot be careful not to over water it. Keep the soil moist but not soggy. The soil should be moist to the touch but you should not be able to squeeze water from it.

If you are moving to a 7-10 zone, you can plant the azalea in your yard. Again you will need to plant the azalea in soil that drains well.  I also suggest mulching the azalea with pine mulch. During the warm season place it on your deck or patio.  During the winter place it in a room with lots of light.

During the growing season (April through August), make sure you fertilize it.  You can use liquid mir-acid every couple of weeks. Once in the ground use a slow release fertilize with a systemic insecticide once a month.

Good luck and please kee me posted.

This plant care questions was brought ot you by Mobile AL Florists