bedir than
Full Moon Storyteller
No. Ready action on page 193 phb specifies that a spell that you ready must have a casting time of 1 action. Ritualising a spell increases casting time by 10 minutes.
As a sidenote it turns into a concentration as well.
Thanks. I may have to house rule it, due to other house rules. But at least I'll know why I need to do it.