The 411 on 5-1-1
Good afternoon all. Just finished sifting & rinsing my gritty mix for my Plumeria & am now in the process of putting the 5-1-1 together for my Brugmansia. Been reading all the various posts about adding dolomitic lime and/or gypsum to either mix & was wondering if some compassionate soul could kindly point me in the right direction before I add either to my mixes...
My water report reads something like this:
Total Alkalinity: 5-51 units: mg/l
Total Hardness: 11-70 units: mg/l
Calcium Hardness: 7-56 units: mg/l
ph: 6.6 - 8.9 units MCL: 7.5 - 8.5
Please pardon my post if you find my questions bordering outright stupidity but this is an area I tend to be lax in & felt it best to confer with those better versed in such ;).
With that said, do I still need to add lime to the 5-1-1 & gypsum to the gritty? I had read that Plumeria like a pH of 6.4 - 6.8 & that Brugs prefer a pH of 6.0 but can tolerate a pH between 5.5 - 7.0.
I had plans on collecting rainwater this yr to water my containers but since the weather's been a crapshoot thus far I need to know if using my tap water is going to present a problem for my plants in these mixes?