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Unwanted visitors - How to deter frogs

Other unwelcome visitors: cats | foxes | frogs | moles :: pests and diseases | ants | aphids | blackspot | botrytis - gray mold | caterpillars | Japanese beetle larvae | leatherjackets | mealybugs | powdery mildew | red spider mite | rust | slugs and snails | vine weevils | whitefly

First of all, it has to be said that under the vast majority of circumstances, you don't want to deter frogs from your garden at all but attract them.

Any frogs in your garden will be a lot more nervous of you than you are of them.

As well as being a valuable part of the native wildlife of all countries, they are a great friend to the gardener in that they munch their way through large quantities of slugs - and the conditions that attract slugs also attract frogs.

This page came about because I received a number of emails in fairly rapid succession from people from the UK to the US and Canada, Australia and somewhere where the mailer didn't say, but his problem was with noisy tree-frogs.

It seems that there are circumstances where gardeners are inundated with frogs in quantities akin to a biblical plague. People have described "taking bucket-load after bucket load" back to the wild, or having very messy lawn-mowing and strimming sessions (best not to think about that one!)

So if this applies to you, if the calls of amorous male tree frogs are keeping you awake, or if there are frogs sharing your swimming pool, but not pulling their weight in skimming the leaves, I hope this page will be of use.

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There is no easy answer. I didn't know of one, so I posted the question on the home page, hoping some-one might help, all that came about was the question was picked up by Google and I got lots more emails from people asking if I'd found an answer yet!

In the end I sent an email to various amphibian sites on the web and posted the question on relevant bulletin boards. The response wasn't exactly overwhelming, but the answers are either paraphrased or quoted here.

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There is no simple frog deterrent, no harmless chemical, plastic heron or warning sign that will make them think "oh oh, better not go there". The only ways to stop frogs are to:

Remove the conditions that attracts them in the first place.

Divert them from the rest of the garden with a froggy corner

Put some kind of physical barrier in place that they can't cross.

Frogs and toads are attracted to your garden for two reasons. The garden provides a source of food in the form of (amongst other things) slugs, which they eat in large numbers. Secondly, they are attracted by shady, cool, moist places and water features.

The most effective method of deterring them is to remove the slugs (ha ha) and re-design the damp cool spots out of the garden. Neither method is easy but if you are desperate to get the frogs out, it is the only way.

Well, here is something that might surprise you! After many hours on the phone speaking to "reptile professors" in Tallahassee, I found out that if you want to deter frogs without harming them (like I wanted to) all you do is spray a heavy concentrate of "SALT WATER" around the areas you don't want them. What happens is the salt will sting the feet and this makes em move out. Be careful if you have sensitive plants. I just wanted them off my ledges of my house and leaving their droppings. It worked like magic!
 - Lynne, Tampa Florida

Note Paul - webmaster, plants of almost any kind hate salt water and it will kill most greenery especially with repeated sprayings. But this sounds like a fantastic tip if applied sparingly - and the only effective one I've heard of.

Sent in by email

I just finished reading your article on getting rid of frogs. Your panel of experts didn't have many ideas on getting rid of them. Some of the experts suggest that we learn to embrace nature. I have small children and where we don't have a problem with the frogs under our low deck, we do have a problem with the very large snakes that see the frogs as a great food source. Not one of the "experts" pondered on what the invasion of frogs could then in turn lead to.
name and email supplied

Reply - Paul, webmaster

Thanks for your comments, that's one consequence that I hadn't thought of, not living where there are snakes or where there are great numbers of frogs myself. I think the bottom line is that there basically aren't any easy ways of getting rid of frogs and that's why there are few ideas of how to do it.

The main way is to not to accidentally create an environment where the frogs like to be. I suppose the same could be said of the snakes, if you hadn't created a good environment for them to be, then they wouldn't be there. I know it's a major upheaval, but the easiest way I can see to rid yourself of snakes would be to replace your deck with patio slabs.

From; Tim Halliday, Professor in Biology & International Director.
Declining Amphibian Populations Task Force (DAPTF)

People should rejoice when they find frogs in their garden, given that they are vanishing from so many parts of the world. My advice is that they should hold off mowing, etc. until the frogs disperse and find safe hiding places, which they soon do. In my experience, frogs are only in the open when it's damp; surely, you should not mow your grass under such conditions.

With best wishes,


From Kingsnake Amphibian forum:

he question is: why would anyone want to keep toads out of the garden? they eat bugs! if the garden is organic with no pesticide/fertilizer that would be great. people just need to be more vigilant when they are working in the lawn. I suppose a fence would keep them out for a while but the toads aren't going anywhere. tell them to embrace nature, not kick it out.

I agree entirely with the above. I think that any reply to these people should thoroughly explain the role of amphibians (or any wild animal for that matter) in their environment. I expect that you already understand that, but I wanted to emphasize that to you.

I would say that anytime there are problems with a certain area being over-run with a certain animal, it is usually related directly to the food source. Since it is impossible to get rid of all the insects, it would be impossible to get rid of the frogs. You could erect a barrier, but that would be unsightly.

Unfortunately, I don't have any answers for you. But it would be nice to explain to them that a bucket load of toads is far better than a bucket load of plant eating insects.

I know what you are talking about too. I know all about the cane toads in Australia. Just fyi- Australia introduced them to eat sugar cane beetles. they are not native. Another brilliant decision made by man.

There is no way to get rid of the toads. people have to live with them. gardens probably best habitat left for the toads in the area. tell them to put in a small pond and some shrubs between the garden and where the toads come from. They will go there instead but not all of them.


From: Gary S. Casper
Collections Manager, Herpetology & Ichthyology, Milwaukee Public Museum

Basically, if frogs are on a landscape they have a breeding pond, and during certain times of the year they will be out and about in numbers. Normally there is a spring migration to the pond, a mid-summer exodus of young from the pond, and finally an autumn return to the vicinity of the pond. Most movements occur during rain events.

Most of the problems I have heard of in the past were in regards to frogs becoming trapped in swimming pools, where they hop in and then can't get out. The only effective way to resolve this is with barriers, some sort of low fencing or decorative wall that the frogs can't pass. The same trick would work to keep frogs out of gardens, although given the benefits to be derived from having insectivorous frogs in the garden, I'm not sure why people would want to keep frogs out of the garden.

The occasional diced frog in the lawn mower can be gruesome, but rarely has an effect at the population level. This can be largely avoided by mowing when frogs are in retreats - dry and warm periods.

Back to barriers, to reduce the extent of them they should be placed where they are most effective. One should assess where the frogs are coming from and going to, and then put barriers in place to direct them around the area designated a no-frog zone. Depending on the landscape, this may not require a complete enclosure of the frog-free zone. Often a barrier on one side that forces the frogs into another direction will suffice.

What also goes a long way is learning tolerance and appreciation of wildlife in the garden, and using a bit of common sense to time activities such as mowing to periods when frogs are not on the lawn.

Hope this helps,


Peter Bronski
Staff Ecologist,
Audubon Cooperative Sanctuary Program, Audubon International  NY

I too am unfamiliar with means of deterring frogs from the garden without harming them. Frogs and other amphibians tend to congregate around water sources (ponds, streams, and I suppose in some misdirected cases, swimming pools) during breeding season, which is usually only a brief period of the year.  During this time you might expect something of a biblical plague of them, but at other times I would expect them to distribute throughout the landscape.  Amphibians pose no hazard to humans directly, and in fact, species like frogs perform a valuable service in terms of insect control. They also serve as a valuable food source for other larger animals.

So in short, I cannot offer much advice for simple, humane control.  If the frogs can be tolerated during breeding season then hopefully their concentration will decrease afterward and gardeners can have fewer troubling encounters between frogs and lawn mowers.


From: Allen Salzberg, Editor/Publisher, HerpDigest.

Sounds like bullfrogs, they get exported in large numbers with fish people buy for their ponds and they without an natural enemies can get very prolific. Look up on websites for frogs and see if it matches. Then look for suggestions how to control them. Once in an area with the numbers you are talking about sounds like you can only control the population if at all.


From Bruce Kingsbury

Hmm - Usually the problem is in the other direction.

Frogs disperse away from reproductive sites, and these may well be out of the control of the gardener. In “good” years, a lot of frogs may be hopping around looking for somewhere to live.

Swimming pools won't work for them as reproductive sites, because of the chemicals, but they don't know that, so they try anyway. Often they are then trapped by the coping around the pool.

Frogs don't like open, dry areas, but unless you are desert gardening, this might not be worthwhile information!

Does that help, or at least explain things a little? Good luck!


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