Half-Square Triangle Block of the Month: September

Saturday, September 1, 2012

Half-Square Triangle Block of the Month September Quilt Block Tutorial - In Color Order
Welcome to the Half-Square Triangle Block of the Month! For each month in 2012, I'll present a quick tutorial for a traditional quilt block using half-square triangles (HST)! It's going to be a lot of fun, feel free to join in at any time! For past posts see here.

Happy September! Today I'm sharing with you the ninth block of our block of the month series!

Traditional Method:
- (8) 4" squares from background fabric (white)
- (2) 4" squares from print fabric (green)
- (2) 4" squares from second print fabric (turquoise)
- (4) 4" squares from third print fabric (navy)

Alternative Method:
- (4) 6" squares from background fabric (white)
- (1) 6" squares from print fabric (green)
- (1) 6" squares from second print fabric (turquoise)
- (2) 6" squares from third print fabric (navy)

1. Assemble your half-square triangles using either the traditional method, or the alternative method. Press seams open.

2. Trim your HSTs to 3.5" square.

3. Arrange your HSTs as shown in the image above.

4. Sew your HSTs into four rows. Press seams in alternating directions.

5. Sew your four rows together, pinning where the seams match up. Press seams open. Trim block to 12.5" if necessary.

Voila! You're done! :)

If you create a block using this tutorial I hope you'll add it to the flickr group!

Happy Sewing!


  1. I just love the colours you are using for these blocks Jeni, the finished quilt is going to be amazing!

  2. Love the color combo for this block!

  3. It's lovely and you've chosen gorgeous colours/prints to go with it. I've once made a pleated skirt from the top one, only in a light aqua shade. Probably not the best choice back then, it's a little stiffer than most quilting cottons I've come across.

  4. What a fun block!I can't believe we are to sept. already. Thanks so much for doing this; it has been such a great fit for me and such an easy way to make a quilt. Thank you for all the work you have put in to make it easy for us!

  5. Love this block and the colors!!

  6. Wait, I think there is an error in the amounts for the alternative method. Shouldn't there be 2 navy? Have I made a mistake?

  7. Lynn - Thanks for catching that, you're absolutely right! Fixed it!

  8. I will really have to pay attention on this one! I love it!

  9. Is this called Windblown Square? I don't think you mentioned the name of the block in your post.

  10. I love this Windblown Star Block!! My sister did too, as she picked it out for a whole quilt a few years back! It was in Blues and cream, looked like Blueberries and Cream when it was done! Mind you its huge! King size plus, and I was glad to see it finished!!!
    Thank you Jeni for showing lots of people this beautiful block. Heather in Australia

  11. I love this tutorial... i have attached a link that tell you ALL the names of blocks for quilts, its kinda crazy to see so many.http://delawarequilts.com/BOMs/index.html

  12. this may work better:



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