Welcome back to another Foolish review of the hottest stocks, as ranked by Motley Fool CAPS. We're looking at the three best-performing industries over the past 30 days, and your favorite long and short candidates in each.

Last week, and the week prior, fertilizer producers such as Terra Nitrogen (NYSE:TNH) smelled sweeter than flowers after a spring rain. Turns out they're still the best of the best, enjoying a 21.6% average gain over the past 30 days.

Who are the other hotties? Have a look:

  • In second place, solar stocks are turning up the heat, returning 19.7% as a group since early June.
  • And in third, stocks from Hawaii are as green as a sugarcane field, up 18.4% on average over the past month.

According to you, our Foolish readers, the best stocks in these industries to own now -- i.e., those with four or the maximum five stars in CAPS -- are:

Company

CAPS Stars

No. of CAPS Ratings

Bullish CAPS Ratings

Bull Ratio

Agrium

*****

106

103

97.2%

Kyocera

****

60

59

98.3%

Suntech Power

****

1,301

1,256

96.5%

Potash Corp. (NYSE:POT)

****

342

328

95.9%

Mosaic (NYSE:MOS)

****

138

132

95.7%

**Source: Motley Fool CAPS as of July 6.

And your favorite short candidates -- those rated with one or two stars in CAPS -- are:

Company

CAPS Stars

No. of CAPS Ratings

Bearish CAPS Ratings

Bear Ratio

Canadian Solar

*

135

69

51.1%

Hoku Scientific

*

96

49

51.0%

Trina Solar

*

461

192

41.6%

Hawaiian Holdings

*

28

11

39.3%

First Solar (NASDAQ:FSLR)

**

449

105

23.4%

SunPower (NASDAQ:SPWR)

**

437

97

22.2%

**Source: Motley Fool CAPS as of July 6.

Do you agree? Disagree? Let us know what you think by signing up for CAPS today. It's 100% free to participate.

Cap off your day with related Foolishness:

Fool contributor Tim Beyers, ranked 2,700 out of more than 59,000 participants in CAPS, holds no shares in any companies mentioned above. Find Tim's holdings in his  profile, or check out his blog. Suntech Power is a Rule Breakers recommendation. The Motley Fool's disclosure policy is hotter than Georgia asphalt.