Arboretum Square

Arboretum Square Crochet Pattern by Sonya Blackstone

What Is Being Made

The Arboretum Square is a 12" x 12" crochet afghan square designed by Sonya Blackstone. This versatile square project can be used as a standalone decorative piece or incorporated into larger projects such as crochet blankets and granny square sweaters. The finished square measures 12 inches on each side, making it a substantial component for multi-square garment and home décor projects.

Craft and Technique Overview

This is a crochet project worked in the round, creating a square shape through strategic increases and stitch placement. The pattern uses fundamental crochet techniques suitable for intermediate-level crafters who have mastered basic stitches and are ready to work with multi-color yarn and more complex stitch sequences. The design allows for creative color work, as the pattern accommodates up to 16 different colors within a single square.

Stitches Used

The Arboretum Square employs a variety of essential crochet stitches to create its structure and texture:

• Chain stitch (ch) – Used for foundation and turning chains
• Single crochet (sc) – A short, tight stitch for detail and shaping
• Double crochet (dc) – A taller stitch that creates the primary fabric
• Extended half double crochet (ehdc) – A special stitch variation detailed in the pattern's special stitches section
• Slip stitch (sl st) – Used to join rounds and create seamless transitions
• Treble loop over (TLO) – A special stitch technique defined within the pattern instructions

Materials and Tools Required

The Arboretum Square pattern calls for Blackstone Designs Arboretum Worsted Weight Yarn, which is classified as aran weight (#4) yarn. The pattern requires 2 skeins in 16 different colors, allowing crafters to create a richly multicolored square or work with fewer colors depending on personal preference. A J/10/6.00mm crochet hook is used to work with this yarn weight. Additional tools include a yarn needle for weaving in ends and scissors for cutting yarn.

Gauge and Finished Measurements

Proper gauge is essential for achieving the correct finished size. The pattern specifies that the square should measure 4.25 inches after round 5, providing an early checkpoint to ensure proper tension and hook size. The finished measurement of 12" x 12" makes this square ideal for projects requiring substantial, uniform components.

Skill Level and Pattern Format

The Arboretum Square is rated as an intermediate difficulty level project, making it accessible to crocheters who have completed beginner projects and are comfortable with standard crochet terminology and techniques. The pattern is provided as a downloadable PDF, allowing crafters to access instructions digitally and print them for reference while working. The pattern is written in U.S. crochet terms, ensuring clarity for crocheters familiar with American stitch abbreviations and measurements.