# Can I use Cal Mag with Fox Farms Trio? **URL:** \ **Category:** Nutrients\ **Created:** [September 29, 2020, 9:11pm UTC](https://ilgmforum.com/t/can-i-use-cal-mag-with-fox-farms-trio/55097 "2020-09-29T21:11:43Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![EarlyPearl](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/earlypearl/32/85923_2.png) [@EarlyPearl](https://ilgmforum.com/u/EarlyPearl)\ **Post date:** [September 29, 2020, 9:11pm UTC](https://ilgmforum.com/t/can-i-use-cal-mag-with-fox-farms-trio/55097/1 "2020-09-29T21:11:43Z")
If so, do I use them mixed together or by itself? Thanks… ---
**Author:** ![Myfriendis410](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/myfriendis410/32/556067_2.png) [@Myfriendis410](https://ilgmforum.com/u/Myfriendis410)\ **Post date:** [September 29, 2020, 9:27pm UTC](https://ilgmforum.com/t/can-i-use-cal-mag-with-fox-farms-trio/55097/2 "2020-09-29T21:27:24Z")
You can, I use GH and they advise adding cal mag before any base nutes. If using silica; silica first then cal mag. I normally only give it during water-only days but that’s just me. ---
**Author:** ![thecount13](https://avatars.discourse-cdn.com/v4/letter/t/c2a13f/32.png) [@thecount13](https://ilgmforum.com/u/thecount13)\ **Post date:** [September 30, 2020, 2:26pm UTC](https://ilgmforum.com/t/can-i-use-cal-mag-with-fox-farms-trio/55097/3 "2020-09-30T14:26:57Z")
Could you explain to me the value of using Cal Mag please? I have read about its use and was wondering when to use, during the entire grow, and how much? thanks 🤣 ---
**Author:** ![EarlyPearl](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/earlypearl/32/85923_2.png) [@EarlyPearl](https://ilgmforum.com/u/EarlyPearl)\ **Post date:** [September 30, 2020, 2:40pm UTC](https://ilgmforum.com/t/can-i-use-cal-mag-with-fox-farms-trio/55097/4 "2020-09-30T14:40:09Z")
I’m trying to figure out the same thing. From what I’ve read it supposed to help with plant deficiencies. I would like to know for sure though. ---
**Author:** ![Myfriendis410](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/myfriendis410/32/556067_2.png) [@Myfriendis410](https://ilgmforum.com/u/Myfriendis410)\ **Post date:** [September 30, 2020, 2:41pm UTC](https://ilgmforum.com/t/can-i-use-cal-mag-with-fox-farms-trio/55097/5 "2020-09-30T14:41:21Z")
Indoor growing with high intensity lights causes increased demand for calcium. This supplements that. If plant is experiencing a deficiency usually cal mag is the treatment. ---
**Author:** ![thecount13](https://avatars.discourse-cdn.com/v4/letter/t/c2a13f/32.png) [@thecount13](https://ilgmforum.com/u/thecount13)\ **Post date:** [September 30, 2020, 2:45pm UTC](https://ilgmforum.com/t/can-i-use-cal-mag-with-fox-farms-trio/55097/6 "2020-09-30T14:45:34Z")
Thanks, when do you advise to use it. I have read than some supplement when they only water, but do you make it a regular item, and how can you tell your plant needs cal mag? ---
**Author:** ![Myfriendis410](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/myfriendis410/32/556067_2.png) [@Myfriendis410](https://ilgmforum.com/u/Myfriendis410)\ **Post date:** [September 30, 2020, 2:55pm UTC](https://ilgmforum.com/t/can-i-use-cal-mag-with-fox-farms-trio/55097/7 "2020-09-30T14:55:35Z")
> [@thecount13](#): > > how can you tell your plant needs cal mag? If you see a deficiency starting, use a chart to determine what it is. If it’s calcium or magnesium then add cal mag per package requirements. Some growers just go ahead and add it. It won’t hurt the plant. I normally dose plant on water only days. Outdoors in-ground normally not necessary. ---
**Author:** ![thecount13](https://avatars.discourse-cdn.com/v4/letter/t/c2a13f/32.png) [@thecount13](https://ilgmforum.com/u/thecount13)\ **Post date:** [September 30, 2020, 3:01pm UTC](https://ilgmforum.com/t/can-i-use-cal-mag-with-fox-farms-trio/55097/8 "2020-09-30T15:01:53Z")
Thanks that is what is so great about this forum. Experienced growers willing to help others. this hit for you 🤣 🦇 ---
**Author:** ![EarlyPearl](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/earlypearl/32/85923_2.png) [@EarlyPearl](https://ilgmforum.com/u/EarlyPearl)\ **Post date:** [September 30, 2020, 4:35pm UTC](https://ilgmforum.com/t/can-i-use-cal-mag-with-fox-farms-trio/55097/9 "2020-09-30T16:35:11Z")
Thank you for contacting FoxFarm! I would be happy to help. Yes, you can use _ **BushDoctor Cal-Mag** _ together with our _Soil Trio_ products; _ **Grow Big** _ , _ **Big Bloom** _ and _ **Tiger Bloom** _ . I received this email form FF. Mine is not the Bushdoctor, but I’m assuming regular Cal Mag is pretty much the same thing.