# Is it mag deficiency? **URL:** \ **Category:** Troubleshooting\ **Tags:** autoflower\ **Created:** [February 12, 2025, 6:22pm UTC](https://ilgmforum.com/t/is-it-mag-deficiency/117673 "2025-02-12T18:22:57Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Shroom](https://avatars.discourse-cdn.com/v4/letter/s/94ad74/32.png) [@Shroom](https://ilgmforum.com/u/Shroom)\ **Post date:** [February 12, 2025, 6:22pm UTC](https://ilgmforum.com/t/is-it-mag-deficiency/117673/1 "2025-02-12T18:22:57Z")
Hello, Currently having this autoflower in 1 week 1/2 | 2 weeks flowering. It’s starting to show some deficiency I guess. PH is ok. Using Terra aquatica tri part + calmag at 70% recommended dose. Lower leaf don’t seem as much affected. If it’s a mag def, should i start using 100% recommended dose for nuts? Cheers! ![20250213_061730](https://global.discourse-cdn.com/growingmarijuana/original/4X/1/2/4/124b0b45b6078c23372aea255b604e43984ce117.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:** [February 12, 2025, 6:24pm UTC](https://ilgmforum.com/t/is-it-mag-deficiency/117673/2 "2025-02-12T18:24:23Z")
I don’t see a problem. The plant looks very healthy. If you are using a cal/mag product, then a mag deficiency is very unlikely. ---
**Author:** ![Shroom](https://avatars.discourse-cdn.com/v4/letter/s/94ad74/32.png) [@Shroom](https://ilgmforum.com/u/Shroom)\ **Post date:** [February 12, 2025, 6:38pm UTC](https://ilgmforum.com/t/is-it-mag-deficiency/117673/3 "2025-02-12T18:38:38Z")
It seems it is yellowing between the veins each day a little more. They are not a nice dark green like 3 or 4 days ago. Would it be normal going into flowering then? ---
**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:** [February 12, 2025, 6:40pm UTC](https://ilgmforum.com/t/is-it-mag-deficiency/117673/4 "2025-02-12T18:40:02Z")
It takes a few days for chlorophyll to fill new growth in with a darker green. ---
**Author:** ![Shroom](https://avatars.discourse-cdn.com/v4/letter/s/94ad74/32.png) [@Shroom](https://ilgmforum.com/u/Shroom)\ **Post date:** [February 12, 2025, 6:52pm UTC](https://ilgmforum.com/t/is-it-mag-deficiency/117673/5 "2025-02-12T18:52:31Z")
Cheers 🙂 Would you keep dosage at 70% recomended or up to 100% in flo for autos? ---
**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:** [February 12, 2025, 6:53pm UTC](https://ilgmforum.com/t/is-it-mag-deficiency/117673/6 "2025-02-12T18:53:02Z")
Maintain a runoff PPM of ~1,000. ---
**Author:** ![Growdoc](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/growdoc/32/1109917_2.png) [@Growdoc](https://ilgmforum.com/u/Growdoc)\ **Post date:** [February 12, 2025, 8:47pm UTC](https://ilgmforum.com/t/is-it-mag-deficiency/117673/7 "2025-02-12T20:47:51Z")
She is yellow slightly but only between the veins, so yep, probably mag deficiency in beginning stages. When you water, put in cal mag to about 150 ppm or Epsom will do . Then add your nutes to proper ppm or EC for your feed. ---
**Author:** ![Growdoc](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/growdoc/32/1109917_2.png) [@Growdoc](https://ilgmforum.com/u/Growdoc)\ **Post date:** [February 12, 2025, 8:50pm UTC](https://ilgmforum.com/t/is-it-mag-deficiency/117673/8 "2025-02-12T20:50:37Z")
They will use more nutes during flip and stretch stage, you should be fine feeding to maintain 1000 ppm runoff, as @MidwestGuy said. Hit them with the cal mag or Epsom in my other post and they should be green and healthy again. ---
**Author:** ![Fieldofdreams](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/fieldofdreams/32/688813_2.png) [@Fieldofdreams](https://ilgmforum.com/u/Fieldofdreams)\ **Post date:** [February 12, 2025, 9:01pm UTC](https://ilgmforum.com/t/is-it-mag-deficiency/117673/9 "2025-02-12T21:01:06Z")
When I zoom in it does look to be the start of a deficiency. I use my CalMag at full strength and also epson salt at a 3/4 dosage. The led’s really make them gobble it up.