I don't think there is any scientific data to back up a specific time frame. I would just wait to see if you have the fungal problem under control before you start the soil rehab. I'm sure you don't want to go through the work of spreading compost and then end up having to do a second dose of baking soda because the first didn't quite do the trick.

Good point! The sprayer I have is only 5 L so it took me a good while to get the project tackled. PLUS, with my 3 kids I had to wake up at 5 o'clock on 3 days to get it done without messing up our day. So, YES you are right about the wait and see approach. I guess I'm just antsy to get my soil "back to normal"...I haven't seen any "cotton" since my application. Here's hoping!!!!