Rainbow Flower Quilt Block Tutorial
4", 6", 8", and 10" finished

From our Free Quilt Block Pattern Library

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Simple cutting and simple piecing are the hallmarks of the Rainbow Flower quilt block.

It's a variation on an old favorite, the Log Cabin block, that you'll sometimes see called a 'half log cabin'. That's because we're adding 2 rectangles or 'logs' to the block instead of the usual four for each round.

The piecing goes a bit faster than the traditional Log Cabin due to this simple design difference.

There are several free goodies for you in this Rainbow Flower quilt block tutorial. Step-by-step illustrated instructions, as you would expect, of course.

You'll also find:

It's time to cut up and sew!

This tutorial includes a couple of abbreviations. They are:

  • SA—seam allowance
  • RST—right sides together

1/4" SA are used through this tutorial. 

Pressing instructions are highlighted in yellow throughout this tutorial to make them easy to spot.

When instructed to press, first press the patches in the closed position just as they came off your sewing machine. This sets the seam, melding the fibers of the threads into the fibers of the fabric.

Then press the SA to the dark and away from the first patch.

2022's New Quilt Fabrics ~ Get ready to drool!

Click the images below to see the full collection and any commercial and/or free patterns that showcase them (for inspiration, of course!)

Cutting patches for a Rainbow Flower quilt block

The Rainbow Flower patchwork block designThe Rainbow Flower design

Sample Block Size:  6" finished / 6½" unfinished

Grid:   4×4

Design Type: Log Cabin

For the sample block, the Bac patch is a Moda Grunge.

Fabrics Light, Medium, and Dark are all cut from a single ombre fabric from Tula Pink's Daydreamer line, the Dragonfruit Little Fluffy Clouds fabric.

While it makes Swiss cheese out of the fabric, the colors shade perfectly for the effect that I want for my 'rainbow' flower.

Ombre fabric after cutting it up for the different colored patchesSliced to smithereens to get the colored patches I wanted for A, B, and C

Please label all your patches. We refer to their numbers throughout this tutorial.

To print a copy of the block design and cutting chart to use at your cutting table, click here.

Generations Quilt Patterns logo

Cutting Chart for a
Rainbow Flower Quilt Block

~ Traditional Piecing ~

PatchFabricQtyFinished Block Size
4'' 6'' 8'' 10''
1 Bac 1 1½'' x 1½'' 2'' x 2'' 2½'' x 2½'' 3'' x 3''
2 Light 1 1½'' x 1½'' 2'' x 2'' 2½'' x 2½'' 3'' x 3''
3 Light 1 1½'' x 2½'' 2'' x 3½'' 2½'' x 4½'' 3'' x 5½''
4 Medium 1 1½'' x 2½'' 2'' x 3½'' 2½'' x 4½'' 3'' x 5½''
5 Medium 1 1½'' x 3½'' 2'' x 5'' 2½'' x 6½'' 3'' x 8''
6 Dark 1 1½'' x 3½'' 2'' x 5'' 2½'' x 6½'' 3'' x 8''
7 Dark 1 1½'' x 4½'' 2'' x 6½'' 2½'' x 8½'' 3'' x 10½''
Unfinished Block Size 4½'' 6½'' 8½'' 10½''
Grid Size 1'' 1½'' 2'' 2½''

Piece your Rainbow Flower quilt block

With RST, stitch #2 to #1.

After sewing #2 to #1After stitching #1 and #2

Press toward the darker #2 and away from #1.

With RST, layer #3 with #1/#2. I prefer to stitch with the joined patches and their SA on top to avoid flipping the seam allowance when sewing. That means the last patch added, #2, is on top.

This may seem picky, but it's much too easy to add a patch to the wrong side. I'd rather lick the back of my 'fridge than rip out seams. ;)

Press, again away from #2 and to the darker #3 fabric.

With RST, layer #4 with #1/#2/#3, seamed patches on top. The sewn unit is on top; the rectangle is closest to the feed dogs.

Add #4 to #1/#2/#3#4 is underneath these patches closest to the feed dogs

Press as before.

Continue adding the remaining patches in this manner.

After adding #5...

Block after adding #4 and $5After adding #4 and #5

Add #6 and #7, pressing in between for nice flat seams.

After one last final pressing (do check out my favorite SECRET technique to get the flattest piecing EVER—without having to buy any special tools), this is our finished Rainbow Flower quilt block.

After one last visit to the ironing boardPresto! The finished Rainbow Flower quilt block

A quick peek at the back shows how we pressed all the seams to the darker fabrics and away from #1.

The Rainbow Flower sample from the backEvery SA is pressed away from the first patch

Designing a quilt with the Rainbow Flower block

To make it easier to concentrate on the quilt design, there are no outlines around either the Rainbow Flower block or their patches.

First up, are quilts made with Rainbow Flower block in a straight set and the set on point. They are set edge-to-edge, no sashing in between.

With this simple design, whether you're using a handful of fabrics as in our samples, or maybe going scrappy, what is important is the movement from a light fabric choice to a medium to a dark. That's what gives the design its appeal. 

The darker #6 and #7 rectangles separate each Rainbow Flower and make them make sense. Without this separation, you'd have a hot mess for all your piecing time.

Straight set layout, no sashings or cornerstones
Diagonal layout, no sashings

In this second pair of straight set layouts, a light sashing and dark cornerstone layout is first up. Then a dark sashing+cornerstone layout. Both are dramatic.

The light version does a good job separating each Rainbow Flower, while the dark version looks almost like an Attic Windows block—but without any Y-seams.

Straight set with light sashings/dark cornerstones
Straight-set layout, dark sashing/cornerstone

Here are diagonal block layouts of our Rainbow Flowers quilt blocks with the same sashing+cornerstone combinations. 

Diagonal set, light sashing/dark cornerstone
Diagonal layout, dark sashings/cornerstones

Hmm. So many choices. So little time.

More about Log Cabin quilt patterns...

If you love Log Cabin quilts, there's lots more about this favorite pattern here on the website. Use the links below to find YOUR new favorites.

If you need a different size block...

For a list of all the quilt block patterns on this site, start here.

If you know the name of the block, you can shorten your search by using these alphabetical links:

A-D

E-M

N-Z

Click here if you're looking for blocks with at least some paper piecing.

Click here if you're looking for the basic building blocks of quilting, i.e. Flying Geese, half square triangles, quarter square triangles, etc., along with several techniques to make each.

And finally, use these links to find blocks in these finished sizes:

For even more blocks to make...

Click here to learn about my favorite quilt book resources that inspire my patchwork designs.

For you, are quilt block patterns like potato chips?

You can't have just one?!!

Check the fantastic resources I rely on for the majority of the quilt block designs you see on this website. 

To see if they're worthy of a spot in YOUR quilting library, read about them HERE.

NOTE: All the attribution and alternate names shared in the Free Quilt Block Patterns Library came from these four resources.

This article was printed from Generations-Quilt-Patterns.com

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