# Could I get some suggestions on using Fox Farm fertilizers **URL:** \ **Category:** Autoflowers\ **Created:** [June 30, 2021, 7:30am UTC](https://ilgmforum.com/t/could-i-get-some-suggestions-on-using-fox-farm-fertilizers/70053 "2021-06-30T07:30:12Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Grow5150](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/grow5150/32/525930_2.png) [@Grow5150](https://ilgmforum.com/u/Grow5150)\ **Post date:** [June 30, 2021, 7:30am UTC](https://ilgmforum.com/t/could-i-get-some-suggestions-on-using-fox-farm-fertilizers/70053/1 "2021-06-30T07:30:12Z")
I started using Fox Farm fertilizers and was looking for some suggestions on how much and how often to apply to my Autoflowers? I wanted to ask what more experience growers have experienced when using these fertilizers. Also, using Cal-Mag for my plants? Good idea? Thank you everyone 😊 ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/0/3/5/035cbfe4d87643f0a5ddf5148cf86f627ec8897a.jpeg) ---
**Author:** ![MidwestGuy](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/midwestguy/32/914277_2.png) [@MidwestGuy](https://ilgmforum.com/u/MidwestGuy)\ **Post date:** [June 30, 2021, 7:48am UTC](https://ilgmforum.com/t/could-i-get-some-suggestions-on-using-fox-farm-fertilizers/70053/2 "2021-06-30T07:48:36Z")
Weekly feeding amounts, per FF. The schedule is very aggressive and often leads to nute burn. I would start out with half the recommended amounts. ![E5517EA5-1DA9-4979-93C2-5AB0041DBA5F](https://global.discourse-cdn.com/growingmarijuana/original/3X/4/9/496a02a60e4ab7e0f643e214d37fdcad9cb57c90.jpeg) ---
**Author:** ![Grow5150](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/grow5150/32/525930_2.png) [@Grow5150](https://ilgmforum.com/u/Grow5150)\ **Post date:** [June 30, 2021, 7:53am UTC](https://ilgmforum.com/t/could-i-get-some-suggestions-on-using-fox-farm-fertilizers/70053/3 "2021-06-30T07:53:38Z")
Thank you for your reply 👍. Yes I discovered that the hard way with this product. I reduced it down to half of what they are suggesting. I just need to gain a little more experience using it. Do you have any suggestions on the Cal-Mag? ---
**Author:** ![MidwestGuy](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/midwestguy/32/914277_2.png) [@MidwestGuy](https://ilgmforum.com/u/MidwestGuy)\ **Post date:** [June 30, 2021, 7:57am UTC](https://ilgmforum.com/t/could-i-get-some-suggestions-on-using-fox-farm-fertilizers/70053/4 "2021-06-30T07:57:52Z")
> [@Grow5150](#): > > suggestions on the Cal-Mag If you are using a decent soil, then you won’t need cal/mag until you get to flowering. ---
**Author:** ![Grow5150](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/grow5150/32/525930_2.png) [@Grow5150](https://ilgmforum.com/u/Grow5150)\ **Post date:** [June 30, 2021, 9:47am UTC](https://ilgmforum.com/t/could-i-get-some-suggestions-on-using-fox-farm-fertilizers/70053/5 "2021-06-30T09:47:55Z")
Ok, thank you for your help. Much appreciated 👍 ---
**Author:** ![Bullpup](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/bullpup/32/524564_2.png) [@Bullpup](https://ilgmforum.com/u/Bullpup)\ **Post date:** [June 30, 2021, 3:10pm UTC](https://ilgmforum.com/t/could-i-get-some-suggestions-on-using-fox-farm-fertilizers/70053/6 "2021-06-30T15:10:45Z")
I am new here but I believe did experience a CalMag issue 2 weeks after sprout. Although I was using happy Frog I think if you are using RO water it might not hurt adding it. Here is a picture from an earlier post. [Can somebody confirm this is CalMag deficiency please?](https://ilgmforum.com/t/can-somebody-confirm-this-is-calmag-deficiency-please/67315) Mods, If this answer is wrong please delete to propagate misinformation. ---
**Author:** ![MidwestGuy](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/midwestguy/32/914277_2.png) [@MidwestGuy](https://ilgmforum.com/u/MidwestGuy)\ **Post date:** [June 30, 2021, 3:25pm UTC](https://ilgmforum.com/t/could-i-get-some-suggestions-on-using-fox-farm-fertilizers/70053/7 "2021-06-30T15:25:53Z")
Generally not necessary to add cal/mag until one nears flowering if in Fox Farm soils. One exception is if you are using high intensity lighting, which increases cal/mag demand. It is indeed hard to hurt a plant with excess cal/mag, certainly far less probability than adding nitrogen, where we regularly see toxicity problems. Imho people rely far too much on throwing cal/mag at problems assuming it will fix whatever issue is seen. I don’t see many issues that are truly cal/mag deficiencies. People get away with throwing cal/mag at plants precisely because it’s hard to hurt a plant with cal/mag. Others’ may disagree, but that is my opinion and I’ll stand by that opinion. I grow in HF and have never needed to add cal/mag until flowering (8 - 12 weeks of veg.) I start adding it at 5ml per gallon (one gallon only) at the beginning of flowering with each watering. I’ve never had problems with it. ---
**Author:** ![Bullpup](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/bullpup/32/524564_2.png) [@Bullpup](https://ilgmforum.com/u/Bullpup)\ **Post date:** [June 30, 2021, 4:02pm UTC](https://ilgmforum.com/t/could-i-get-some-suggestions-on-using-fox-farm-fertilizers/70053/8 "2021-06-30T16:02:33Z")
As I said I am not the expert but was just pointing a recent issue I had early in grow. Out of the 4 plants this one has been consistently having Issues but the other three were fine. The issue also arose before I started measuring PH and TDS input/runoff as I thought I was safe with Happy Frog for a month. The most recent deficiency was probably lockout as Runoff was low. You have given input to some of my previous post so thanks for for your guidance