Block B Assembly - Step 4 St. Paddy's Field QAL

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Step 3: Assemble Block B

Now that your four-patch units are complete, it’s time to combine them to create Block B.

Each Block B uses 4 four-patch units. PDF Instructions

1. Lay Out Your Units

Place the four four-patch units on your design surface in a 2 × 2 grid.

Rotate the units so the dark green squares form a diagonal line running from the upper right to the lower left of the block as shown in the picture above.

Your layout should look like this:

Top Row

• Four-patch with dark green in the upper right

Bottom Row

• Four-patch with dark green in the lower left

Take a moment to double-check the orientation before sewing.

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2. Sew the Rows Click here for Video Tutorial on Block B Assembly

1. Sew the top two units together.

2. Sew the bottom two units together.

Use a ¼" seam allowance.

Press the seams in the rows toward the darker green squares if possible.

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3. Spin the Center Seams

To reduce bulk in the center:

1. On the back of each row, gently loosen the stitching at the seam intersection.

2. Spin the center seam so the seam allowances rotate in a circular direction.

This creates a small four-patch “pinwheel” seam on the back and allows the block to lay flatter.

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4. Join the Rows

1. Place the two rows right sides together.

2. Nest the center seams so the intersections lock together.

3. Sew across the center using a ¼" seam.

Spin the center Seam and Press, Refer to video linked above for visual instructions

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5. Check Your Block 

Your finished Block B should measure the unfinished size 8.5"square and show the diagonal chain of dark green squares across the block.

Be sure to join us on Facebook at Sister of The Divide Quilt Alongs  and Share your progress!

Hang out with us and in Step 5 we will begin to assemble the Quilt Top!

St. Paddy's Field Quilt Along - Step 3

 

St. Paddy’s Field Quilt Along Block B Components

 

Four-Patch Units PDF Link

For this step you will make:

• 64 Dark Four-Patch Units
• 64 Light Four-Patch Units

Each unit will measure 4½" x 4½" unfinished.

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Before You Begin

• Use a ¼" seam allowance for all piecing.
• WOF = Width of Fabric.
• Press carefully to keep units accurate.
• For best results, chain piece your units whenever possible.

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Cutting

All strips are cut 2½" x WOF (Width of Fabric).

Dark Four-Patch Units

Cut:

• 4 Dark Green strips
• 4 Background strips

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Light Four-Patch Units

Cut:

• 2 Medium Green strips
• 6 Background strips

These will be used to create two different strip sets.

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Dark Four-Patch Units

Make the Strip Set

1. Sew one dark green strip to one background strip, right sides together, using a ¼" seam allowance.
2. Press the seam toward the dark fabric.

Subcut

3. Cut the strip set into 2½" segments.

Assemble Units

4. Pair two segments together to form the four-patch unit.
5. Sew using a ¼" seam allowance.
6. Spin your seams when you press. See the detailed video on spinning seams. Video Link

Repeat to make 64 Dark Four-Patch Units.

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Light Four-Patch Units

The light four-patch units are made using two strip sets.

Strip Set A

1. Sew one medium green strip to one background strip, right sides together.
2. Press the seam toward the medium fabric.

Strip Set B

1. Sew one background strip to one background strip, right sides together.
2. Press the seam to one side.

Subcut

3. Cut both strip sets into 2½" segments.

Assemble Units

4. Pair one segment from Strip Set A with one segment from Strip Set B.
5. Sew using a ¼" seam allowance.
6. Spin your seams when you press. See the detailed video on spinning seams.

Repeat to make 64 Light Four-Patch Units.

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Quilter’s Tip

Chain piecing your four-patch units will make this step go quickly and keep your pieces organized.

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Progress Check

At this stage you should have:

• 64 Dark Four-Patch Units
• 64 Light Four-Patch Units

Each unit should measure 4½" x 4½" unfinished.

Tomorrow we will put the four patch blocks together to finish creating Block B

St. Paddy's Field Quilt Along - Step 2 and Block A

 

🍀 St. Paddy’s Field Quilt Along

Step 2 and Block A

Four Patch Blocks (Strip-Set Method) PDF link

In this step, we’ll create easy, accurate Four Patch blocks using a strip set — fast and perfect for scrappy quilts.

You will need:

• 2 fabric strips measuring 2½″ x 20″ (cut your WOF strips in half)
  (Use 1 of your dark green and 1 of your background)

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✂️ Step 2A — Make the Strip Set

1.    Place the two strips right sides together, aligning the long edges.

2.    Sew along the long edge using a ¼″ seam allowance.

3.    Press the seam allowance toward the darker fabric.

You now have a strip set measuring approximately 4½″ x 20″. Chain piece your strip sets for faster finishing.

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✂️ Step 2B — Subcut the Strip Set

4.    Square up one end of the strip set.

5.    Cut the strip set into 2½″ segments across the width.

You will get approximately 8 segments. If you are going scrappy mix and match your segments.

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🧵 Step 2C — Make the Four Patch

6.    Take two segments and place them right sides together, rotating one so the fabrics alternate (light/dark opposite).

7.    Nest the center seams and pin.

8.    Sew along one side using a ¼″ seam allowance.

9.    Press the seam to one side.

🎉 You now have one Four Patch block measuring 4½″ unfinished (4″ finished).

Repeat with remaining segments.

⭐ Quilter Tip from Sister Of The Divide Chain piece your segments for speed — this step goes FAST and is super satisfying 💚

🍀 St. Paddy’s Field Quilt Along

Block A Assembly

In this step, we’ll combine your Half-Square Triangles (HSTs) and Four Patch units to create Block A.🧩 Layout First (Do Not Skip!)

Arrange your units into a 2 × 2 layout:

Top row:
▪ Four Patch — HST

Bottom row:
▪ HST — Four Patch

👉 Pay attention to the direction of the HSTs so the diagonals create the large “windmill” effect shown in the diagram.

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🧵 Sew the Rows

1.    Sew the top row units together.

2.    Sew the bottom row units together.

3.    Press the row seams toward the Four Patch blocks (this helps nesting).

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✨ Join the Rows

4.    Place the two rows right sides together.

5.    Nest the center seams carefully and pin.

6.    Sew across using a ¼″ seam allowance.

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🌀 Spin the Center Seam

This block has a bulky intersection — spinning the seam makes it lay flat.

7.    From the back, gently loosen the very center stitches.

8.    Rotate the seam allowances so they form a small pinwheel.

9.    Press from the back, then the front.

Your block should now lie beautifully flat 💚

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📏 Finished Size

Block A should measure:

8.5″ unfinished
(8″ finished in the quilt)

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⭐ Sister Of The Divide Tip

Consistency matters — make sure all Block A units face the same direction so your quilt design emerges correctly.