Autumnal half square triangles Quilt on fence

Autumnal Half Square Triangles Quilt

This is a busy, yet easy to sew quilt design that uses a repeating Half Square Triangle pattern.

This quilt showcases the use of the simple directional printed fabric I used, to create a design full of the colours of autumn. This would also work well with coordinating plains, or busy contrasting prints!


  • Sewing machine – I used the Brother NV1800Q
  • Quilting foot (optional)
  • Quilting fabrics
  • Backing fabric
  • Pen or pencil
  • Coordinating thread
  • Pins
  • Rotary cutter
  • Quilting ruler
  • Cutting at
  • Scissors
  • Iron
  • Curved safety pins (optional)
  • Quilt wadding
  • Binding, or create your own with coordinating fabric.
Finished Half Square Triangle Quilt

How to

Step 1

Gather your tools and materials for cutting out your quilt squares. Using your rotary cutter and quilting ruler, you will need 270 4.5” (11.43cm) squares in total. I chose to use five different colour fabrics so I cut 54 of each colourway.

Tip: you can adapt how many squares you would like, if you would like a smaller, or larger quilt size.
Rotary cutting patchwork 4.5” (11.43cm) squares ready for sewing

Step 2

Take one of your squares and using your quilting ruler and a pen or pencil, draw a line diagonally from one corner to the other to mark your square into two triangles.
Marking the HST on each square

Step 3

Place another colour square against it right sides together. Using a straight running stitch, sew either side of this line by approximately 0.25” (0.635cm).
I wanted an even number of all the different coloured Half Square Triangles so make sure to split out your colours evenly to each other.

Tip: I use my sewing machine foot as a guide for this. You could use your laser guideline, if your machine has one.
Sewing either side of the marked line

Step 4

Cut along your marked line to create two half square triangles.
Cut along your marked line to create your HST

Step 5

Repeat with all your squares to turn them all into Half Square Triangles before pressing open to lay them flat.
Press open your HST’s to lay them flat

Step 6

Lay your Half Square Triangle squares out into the pattern you would like. I chose a repeating order of colour combinations, making sure no same colours were next to each other. There are 15 squares across in each row, and 18 rows in total.
Lay out your pattern of HST

Step 7

Organise your columns or rows, so you are ready to sew them together.

Tip: sticky notes between each group helps me to remember which column or row I am doing next to ensure the design stays as planned.
Piles of fabric pieces

Step 8

Sew each HST square together to create each row.
Sew all the HST squares together in each row

Step 9

Lay your rows out to check the pattern is correct and press if required.

Step 10

Sew your rows together to start creating your quilt, making sure to line up each square corner.

Step 11

Once you have sewn all of your quilt together, give it a press if required. Now lay out your backing fabric, right side facing down. Then your wadding, and then your quilt top, right side facing upwards.

Tip: to help connect everything together and stay in position, I use curved safety pins, and roll the quilt tightly up together as I go.
Lay out your quilt with the backing fabric and wadding

Step 12

Attach your quilting foot (if desired) and sew quilting lines onto your now layered up quilt. I chose to use straight lines, diagonally across each diagonal row.
Sew quilting lines onto your quilt

Step 13

Bind your quilt. I chose to create binding in coordinating fabrics, before machine sewing, and finishing with hand sewing and mitred corners.

Tip: if you’d like to learn how to bind a quilt with neat, mitred corners, you can view our How To blog here.
Bind your quilt to finish

Step 14

Trim any threads required and et voila, you are done! One Autumnal Half Square Triangle Quilt.
Finished Half Square Triangle Quilt
I hope you enjoyed making this quilt. I’d love to see what you make, so why not tag myself and Brother into your makes, that way we can share and inspire the rest of the Brother sewing community.

Follow and tag Brother on Instagram and Facebook.
Come say hi, tag and follow me on Instagram, Facebook and Twitter.
Finished Half Square Triangle Quilt

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