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Hi

A magic garden need not advertise its powers. It can be your secret with the Earth. Since no one seems to think twice about herbs or fruit trees growing in a garden, on the stairs or in window boxes, why not pick plants that will bring wealth, protection and love to your home?

Does it mean: Since no one is surprised seeing herbs or fruit trees growing in a garden or on the syairs or in window boxes, so why not choose plants (maybe different then herbs and fruit trees) that would bring to you wealth, protection and love?

Is it what that sentence says?
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The author is saying that you should pick plants that have the desired properties (they bring wealth, etc.) and that don't attract attention.

To put it another way: Don't select unusual plants that might attract unwanted attention when you can just as easily select plants with the desired properties that don't attract attention.
Comments  
Is it what that sentence says?

No, I don't think that's what these sentences say.

I would be surprised to see a fruit tree growing in a window box.

I think the paragraph is about not advertising the powers of a magic garden and that you should go ahead and pick plants that will bring wealth, love and protection to your home. I have heard that this is a very popular thing in California.

John
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Hi

So what does it mean: Since no one seems to think twice about herbs or fruit trees growing in a garden ... ?
Is your question about the idiom "to think twice" ?

I though it was about what you asked - the meaning of the sentences.

Google "define to think twice" and you will see:

http://www.thefreedictionary.com/think+twice

To think twice means: To weigh something carefully. Example: I'd think twice before spending all that money on clothes.
Hi

I have some troubles with the highlighted sentence, the first part especially.

Since no one seems to think twice about herbs or fruit trees growing in a garden, on the stairs or in window boxes, why not pick plants that will bring wealth, protection and love to your home?

I'm just not sure I see a connection between: Since no one seems to think twice about herbs or fruit trees growing in a garden, on the stairs or in window boxes AND why not pick plants that will bring wealth, protection and love to your home.

How would you say it in your own words? Maybe that will make it clearer to me.
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 MalRey's reply was promoted to an answer.
OK. I think I understand. Thanks.