Seedlings and 'true leaves'
I've planted some Rudbekia 'Cherry Brandy' and Antirrinhums in 2 seed trays in my house. They have both germinated and I have placed them on a table by a window.
They are now getting a bit 'leggy' and, although they've been there about 3 weeks, they have yet to grow their 'true leaves'.
Can anybody tell me when they should appear ? or have I made a grievous error !