Believe it or not in all the years of crochet i've never made a corner to corner Granny shell blanket before Its a pattern that gives a lovely crisp square edge......Love that.
In my version, i've used a ch3 to start and tr, to finish but all granny shells are 3dc and i work into the spaces to start and finish.
Simple pattern Corner to corner Granny Shell blanket Im using Hayfield Spirit and a 4mm hook for this sample. But it could be made with Aran of chunky weight yarns US Terms CH4 ROW 1: 3dc and 1tr, into 4th ch from hook. ch3, turn ROW 2: 3dc, into first sp, 3dc, 1tr, into last sp. ch3 turn ROW 3: 3dc into first sp, 3dc into next sp, 3dc,1tr, into last sp, ch3 turn ROW 4+: REPEAT ROW 3, with 3dc into all middle sps. Make the width of the blanket as big as you require. TO MAKE THE SQUARED CORNER ROW 1: Ch3, miss first sp, 3dc in all sps to end, finish with 3dc, 1tr in last sp. ch3 turn. ROW2: 3dc in first sp, 3dc in every space to end, 1tr, into last ch3 sp, ch3, turn ROW 3: CONTINUE UNTIL ITS AS LONG AS YOU REQUIRE. REDUCING THE RECTANGLE OR SQUARE Start with ch3 only [no granny shell in first sp] finish with 1tr, [no granny shell in last sp]
start with ch3 only to decrease
finish with tr only into last sp to decrease
Add a number of granny shells as a border to decorate, leave as it is or add a contrast stitch. FOR MY FIRST EXPERIMENT I am making a 30 row square for the centre....then a border and then more of the corner to corner granny triangles then another border....but it might change so watch out for updates.
make several squares and join in a more exciting pattern if you get bored with doing one giant blanket