MikeInOz wrote: ↑Tue Sep 14, 2021 3:13 am
abhikjha wrote: ↑Tue Sep 14, 2021 2:37 am
One question - I didn't know that acidic soil, requirements of calcium is so important for seed germination and sustenance. What advice you give if someone already sown seeds but didn't acidify the soil or put gypsum in the mix? Is it ok if in next watering cycle, I bottom water them with acidic water with a bit of Calmag?
Cheers
Abhik
Your mix will most likely have calcium in it. I use gypsum to remove any doubt over the whole time the seedlings are in the pot. You can always add gypsum anytime after sowing if you have it. If you use acidic water all the time you should be fine but just make sure you don't over acidify because that can cause other problems! (if you use limestone in the mix you can't acidify it much until all of the lime is dissolved - which almost never happens) I'm not a fan of Calmag as they use calcium chloride. I would prefer some garden lime. If it's too fine and you're worried about it raising the pH, wash it in a bucket first and use what's left on the bottom or you can grind any type of seashell in a mortar and pestle and use that. You don't need much!
My mix is incidentally pure mineral
, so not sure whether it will have any calcium in it. I found good source of gypsum powder on Amazon. It's basically Calcium Sulphate, right?
Here is the link for Gypsum powder:
Going Greens Gypsum for Plants Natural Soil Conditioner for Lawn and Garden (5 KG)
https://www.amazon.in/dp/B08GZLZJ1Q/ref ... UTF8&psc=1
Here is the link for Garden lime powder:
Shehri Kissan The Urban Farmers Dolomite Garden Lime Fertilizer Agricultural Dolomitic Limestone Powder for Calcium, Magnesium Plants Excellent for Soil Treatment, pH Balance, Reduces Acidity -450 g
https://www.amazon.in/dp/B08FZCP461/ref ... 6K0J6ZD0BT
Do these look okay? If I use acidic water everytime (ph 5.5) then I don't need to use garden lime, right?
So if I get these two, I can mix both of them and add on top of soil?
Any idea how to mix them? and how much to add on top of soil?