Zucchini Leaves

Q. Is it harmful to cut the leaves off my zucchini plant once it starts producing? My husband does this every year and it seems to slow down the production of zucchini. He also does this to my tomato plants and they stop blooming.
Allentown, Pennsylvania

A. Your husband should stop removing leaves from your vegetable plants. The leaves are needed for photosynthesis, which is how a plant creates the sugars to survive and produce. Without leaves, the plant will struggle.

If he is concerned that your plants do not bloom enough, then simply supplement your watering with a good liquid fertilizer, like Miracle Gro Tomato Food (which I use as a supplement to 10-10-10 Granular fertilizer in my garden).

Todd A. Efing, CNLP 
Nursery Manager

Van Putte Gardens

Rochester, New York

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Ridding Ponds of Green Water

Q. What is the best way to get rid of green water in the pond other than using a UV light?
San Mateo, California

Q. Yes there are a couple of alternatives to treating green water other than using an ultraviolet light. Water plants are an excellent way to fend off green water. Typically you want to have at least 70% of the water surface covered with plants. This helps prevent the sun from penetrating the water, which then causes green water to form. Plants also help remove excess nutrients in the water, which the green water feeds off of.

Another method of treatment would be barley straw. Barley straw can be used either in its natural straw form or in its already broken down liquid form. The natural chemicals that are released from barley when it decays are a natural preventative for green water. The benefit to its natural straw form is that it lasts longer; however, it may take a few weeks to become effective. Liquid barley is immediately effective, but requires you to retreat every week because there isn’t that constant break down that you find with the straw. I recommend using both in conjunction with each other. This way the liquid gives you the immediate effect that you are looking for while the straw begins to break down. After a couple of weeks using both you can than cease using the liquid and rely solely on the straw for maintenance.

The only other product that does a really good job is Microbial Algae Clean. Microbial Algae Clean is a new product this year that is made by Pond Care. This product is an organic bacterial clarifier that is designed to specifically attack green water. The bacteria found in this product goes after the green water and eats it away.

Brian Beenes
Assistant Garden Center Manager
Sid’s Greenhouse & Garden Center
Palos Hills, IL
Bolingbrook, IL

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Suspended Algae in Ponds

Q. What is the best way to get rid of green water in the pond other than using a UV light?
San Mateo, California

A. I have tried numerous additives to clear suspended algae (the type that causes green water). In my case, and many others of my customers, the only lasting solution is the UV light.

Good luck with your pond!

Best regards,
Dan Eskelson, Clearwater Landscapes
Priest River, Idaho

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Starting Jade Plants

This question has three answers!

Q. I had a beautiful dense jade plant that unfortunately got left outside during a sharp frost, and died. However, shortly before, I took a small cutting, and this has grown to about a foot high, but is very stringy/straggly, i.e. it is growing tall, but not spreading out. My question is, what is the best way to ‘train’ my plant to grow outwards and spread, becomeing more ‘bushy’ - can I save the one I have, or would it be best to take a cutting from this and start from scratch.
United Kingdom

A. I have had lots of jade plants over the years and am sure you were sorry to lose a special one. All is not lost however. If you pinch the plant back, it will branch and get fuller. My guess is that it might like a bit more sun too. A bright window with indirect sun would be good. Hope this helps!!

Barbara Emerson
Have Green Thumb
Manchester, Massachusetts

A. Under the right conditions Jade plants will thrive; under the wrong conditions they’ll decline. It sounds like the cutting you took from the Jade you lost to the frost is not getting enough light. Jades require at least four hours of direct sun per day. This keeps them compact and branched. If the plant you have is well rooted and generally healthy I’d start by cutting it down to just above the first or second node (the point at which the leave meet the stem is a node; the stem between the leaves is the internode). Don’t over water, Jades are succulents and like well drained soil that is permitted to dry out between watering. And by all means get the plant into the light. If it hasn’t had high intensity light introduce it slowly, over a week or two to the direct sunlight to avoid sunburn. You can also consider rooting the cuttings you’ve taken. You can probably root several new plants from the part you cut off your current plant.

Hope this helps. Happy gardening.

Drew Effron
Ball Horticultural Company
www.wave-rave.com

A. I am sorry you lost your large Jade plant, but should be able to grow another from the cutting you took. I will assume the ‘new’ Jade is growing in a flower pot using a well drained soil. Stringy growth usually will occur when the plant is not getting enough light and is being watered too often. My suggestion would be to keep the plant in as bright an area you have if indoors and if it is out doors keep it where it gets some sunlight during the day – all sun should be OK in the UK. Water the Jade only when dry, and if not sure, wait a day. Jade’s can take dryer conditions better than wet. If your plant only has a single stem reaching upwards you may want to cut it in half. Branches will grow out of the ‘node,’ this is where a leaf is or was on the stem. You may be able to root the stem you removed and start another plant as you did with the first.

I have a jade planted with several other succulents on my patio outdoors. I was worried earlier this spring since Chicago area had so much rain, but it is doing very well now. Mine is in full sun.

Philip Schaafsma Sr.
Sid’s Greenhouses and Garden Center
Palos Hills, IL
Bolingbrook, IL

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Zucchini and Pumpkin Flower Trouble

Q. We have a home on Cape Cod and I have tried, in vein, to grow zucchini and pumpkins for the last few years. I get wonderful leaves and flowers, but before the fruit starts, the flowere wither and die. I have asked garden shops and they tell me I have some sort of bug in the sandy soil but give me no remedies.
Could you help?
What a wonderful web site this is!
Cape Cod, Massachusetts

A. Most likely the cause of this problem is lack of pollination. I am wondering if your location near the ocean is impacting that process. If that is the case, it maybe possible to hand pollinate. Here is a link that shows the male and female flowers of zucchini. Take the pollen from the male and dab it on the female one…could use a Q-tip or paint brush.

http://www.pool-room.com/Personal/Plants/Zucchini.html

Here is a link about the pumpkins….

http://www.pumpkinnook.com/howto/pollen.htm

Let me know how it works out!
Barbara Emerson
Have Green Thumb
Manchester, Massachusetts

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Blooming Astilble a Second Time

Q. How can I get my astilbe to bloom a second time?
Belmont, Massachusetts

A. You asked how you can get your Astilbe to rebloom. You can’t! It is not in their nature. What you can do is plant two different kinds in order to get a longer period of bloom. The arendsii group bloom the earliest, usually in June and the cultivars in this group are clumpers. Astilbe chinensis usually does not bloom until July. These are rhizomatous—the plumes are thicker and last for a long time, even after they have lost their color. They also come in a variety of sizes, some dwarf such as ‘Pumila’, some small (12-15”) such as ‘Visions’, some medium (24”) such as ‘Spatsommr’, and some large (36-48”) such as ‘Strauseenfeder’ or ‘Prof. van der Wielen’.

Perennially,
Bobbie Schwartz
Bobbie’s Green Thumb
Shaker Heights, Ohio

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Coffee Grounds Added to the Garden

Q. I am interested in using the coffee grounds that Starbucks provides free to gardeners to add nutrients to the soil. However, I am unsure how much to add to the soil and wonder which perennials would benefit from these grounds. Thank you!
Andover, Massachusetts

A. Thanks for your question about using coffee grounds in your garden. I recently wrote about this on my blog. Here’s what I found out:

Used coffee grounds are a good soil amendment but, contrary to popular belief, grounds don’t make a good fertilizer when used alone. The best use of used coffee grounds is to add them to the compost bin as another source of “green.” The researchers at the Oregon State University Extension Service say when coffee grounds are used as a soil amendment, “keep them damp and add some nitrogen fertilizer when you do this.” Apparently the grounds feed microbes in the soil, which depletes nitrogen and needs to be replaced.
The experts also say, if grounds are used on the soil surface, cover them with leaves or bark mulch.

Another tip when using coffee grounds is to side-dress plants with no more than 1-inch of grounds at a time and to wait until the grounds decompose before adding more.

Starbucks provides information on how to use the grounds in the garden, such as applying the grounds “directly as a top dressing to acid-loving plants like blueberries, hydrangeas, and azaleas.”

Regards,
Jodi Torpey, master gardener
www.WesternGardeners.com

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Damaged Leaves on Butterfly Bush

Q. Something seems to be eating the leaves of my Butterfly bush. Can I use a bug spray on it? Is it safe?
Chatham, Massachusetts

A. There are a few different insects that can feed on a Butterfly Bush. However, not all controls (sprays) work equally on different insects. It is best to monitor the plant and try to either catch the insect or photo the insect doing the feeding or at least of the damage to the leaves. A systemic insecticide, like Orthene, usually does the trick, but I do not advocate spraying any control measure without first seeing either the insect or a photo of the effected leaves.

I would be happy to review any photos you would like to email me.

Happy Gardening.

Todd A. Efing, 
Nursery Manager

Van Putte Gardens

Rochester, New York

A. If you haven’t seen any insects on your butterfly bush, most likely it is some type of night-feeding beetle. I have had the same issue on my own butterfly bush in the past. There are several organic products you could use. The one I would recommend is a product called Spinosad. Spinosad is derived from a naturally occurring soil-dwelling bacterium. It has been used for many years as a safe, natural pesticide. Here on the Cape, it is used commercially to control the winter moth caterpillar, which you may be familiar with. Spinosad will also take care of a wide range of leaf-feeding beetles and various caterpillars. It is available in a ready-to-use spray or as a concentrate you mix with water and apply with a sprayer.

Good luck!

Wendy
Pine Tree Nursery & Landscaping
South Chatham, Massachusetts

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Blooming Endless Summer Hydrangea

Two answers for this question!

Q. I planted Hydrangea Endless Summer Macrophylla mophead three years ago. Bloomed first year and hasn’t bloomed since. Plant looks great. Any ideas?
Gibson, Illinois

A. Hydrangeas not blooming after planting is very common. The plant spends its energy on providing the plant with new leaves and growth once it is moved form a container to the ground. Combine that with the possibility of a higher Nitrogen level and low level of Phosphorus in the soil and you get a healthy growing plant, but one that doesn’t want to bloom.

Simply fertilize your hydrangea two to three times a year with a higher phosphate granular fertilizer over the next year or two and the hydrangea will go back into blooming sequence. A 0-30-0 fertilizer will work well for you. Be sure to read the package for directions. You don’t want to over apply the fertilizer. I would think 1/8 cup of fertilizer would be adequate for each application.

Todd A. Efing, Nursery Manager

Van Putte Gardens

Rochester, New York

A. The problem may be water related. I have been growing Endless Summer for four years. It bloomed well the first year, struggled mightily the next two years, and is blooming prolifically this year. The Hydrangea is planted on a south facing slope, actually not the best location for this plant, and the last two summers have been very dry in Cleveland. I do have irrigation but irrigation is not the same as periodic rainfall. This year, we’ve had a very wet spring and cooler temperatures than normal with some intermittent hot and dry periods. Now we are being inundated with rain again.

Perennially,
Bobbie Schwartz
Bobbie’s Green Thumb
Shaker Heights, Ohio

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Pampas Grass in Shade

Q. I bought some pampas grass and then changed my mind about where to plant it. What would happen if I would plant it in a mostly shady spot? Would it still grow but maybe not as tall?
Portsmouth, Ohio

A. Pampas grass is a full sun plant. If you plant it in the shade, it will stretch for the light and be even taller and floppier than you anticipated. Eventually, it will die.

Perennially,
Bobbie Schwartz
Bobbie’s Green Thumb
Shaker Heights, Ohio

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