How to align the enumerate items using enumitem?

I’m writing a text and I want to save as much space as I can. I’m using the package usepackage{enumitem} in order to manipulate the enumerate easily. In the following code there si a problem with the alignment

documentclass{article}
usepackage{enumitem}
usepackage{blindtext}
begin{document}
  begin{enumerate}[leftmargin=0pt, label=bfseries{Problem theenumi.-}, itemindent=*]
    setcounter{enumi}{1}item blindtext
    setcounter{enumi}{10}item blindtext
    setcounter{enumi}{2}item blindtext
  end{enumerate}
end{document} 

Clearly, when the counter has 2 digits, the alignment fails. How can I solve this problem? Is there another package that I can use?

documentclass{article}
usepackage{enumitem}
usepackage{blindtext}
begin{document}
  begin{enumerate}[leftmargin=0pt, label=textbf{Problem theenumi.-}, itemindent=*,align=left]
    setcounter{enumi}{1}item blindtext
    setcounter{enumi}{10}item blindtext
    setcounter{enumi}{2}item blindtext
  end{enumerate}
end{document}