Name: Rick Corey Everett WA 98204 (Zone 8a) Sunset Zone 5. Koppen Csb. Eco 2f
My guess would be that the kale and other Brassicas would continue to do OK.
But when you do plant something else there, maybe it would be a good idea to add some soil from another bed into the planting row. To increase the number of MR spores.