Spikes sneak up on you. Very insignificant when they start, nestled between dormant p-bulbs. They propagate pretty fast, so it may not be so many years! I grow mine in relatively shallow bulb pans, so they can spread out.
Oh, that's a good idea. Thank you. This is a baby I got from Fred last year so it is blooming off of bulb #3. Last year it had 1 spike so we're on the right trajectory.