Two days ago I had soil of pH 5.5. I impatiently planted my lavender and now I'm worried because lavender needs a pH of 6.5 to 7.5.
I did mix the soil with about 1/4 (volume) of quartz sand and some small stones, but I guess that only avoids the soil being soaked and doesn't influence the pH value.
Tap water, which is what I use for watering, has an average pH of 7.6 over here (Berlin, that is) - might that help?
1) How badly did I mess up? I really want this lavender to thrive and to survive the winter. I already killed a whole balcony full of lavender last year because I didn't know about the importance of avoiding soaked soil, and I just can't live through that again cue dramatic gesture.
2) Is there a somewhat easy way to increase the pH value at root level now that they're planted?
- I read somewhere that limestone takes years to permeate the soil when added to the top of it
- .. or should I add baking soda into my water (ratio of baking soda per liter [gallon] of soil anyone?)
- .. or should I get "pH up" solution for hydroponic growing equipment (I think they're mainly sold for people who homegrow weed)
- .. or should I dig the plants back up, mix in limestone and replant them? After two days the roots probably haven't grown into the added soil yet and it wouldn't bother the plants (?). It would just be annoying for the human involved.