# Yellowing leaves during flowering? **URL:** \ **Category:** Troubleshooting\ **Tags:** indoor-grow\ **Created:** [August 9, 2026, 3:52pm UTC](https://ilgmforum.com/t/yellowing-leaves-during-flowering/122488 "2026-08-09T15:52:28Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![RowdyRod](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/rowdyrod/32/881972_2.png) [@RowdyRod](https://ilgmforum.com/u/RowdyRod)\ **Post date:** [August 9, 2026, 3:52pm UTC](https://ilgmforum.com/t/yellowing-leaves-during-flowering/122488/1 "2026-08-09T15:52:28Z")
I’m in about week 12 of a grow. **Grow details (if known):** Strain: Bubblegum Stage (seedling/veg/flower): week 12, flowering Medium (soil/coco/hydro): soil Light (type + wattage): 2 vivosun 200 @ 75% Environment (temp/RH if known): 78, 45% growing 2 plants, scrogging, all seems uneventful. Been noticing some lighter leaves last couple of weeks. More, now. I give them nutes every third day. Big Bloom, Grow Big, Tiger Bloom. Sensi Cal. Any ideas? PH is OK. **Photos:** ![IMG_9980](https://global.discourse-cdn.com/growingmarijuana/original/4X/1/6/6/1665ee71a40ea0d044451e1df726762e0061a805.jpeg) ---
**Author:** ![merlin44](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/merlin44/32/1090518_2.png) [@merlin44](https://ilgmforum.com/u/merlin44)\ **Post date:** [August 9, 2026, 4:08pm UTC](https://ilgmforum.com/t/yellowing-leaves-during-flowering/122488/2 "2026-08-09T16:08:52Z")
I think that you likely have two things going on. First, the plants will start to fade late in flower. You may also have a nitrogen deficiency. You are not giving it any nutrients with substantial nitrogen. They need much less nitrogen in flower but they still need some. ---
**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:** [August 9, 2026, 4:10pm UTC](https://ilgmforum.com/t/yellowing-leaves-during-flowering/122488/3 "2026-08-09T16:10:18Z")
By week twelve, I’ll assume you mean from planting, not twelve weeks of flower. The white pistols and buds says they are more like 4-5 weeks in flower. They look a bit hungry overall. ---
**Author:** ![Pothead64](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/pothead64/32/1204307_2.png) [@Pothead64](https://ilgmforum.com/u/Pothead64)\ **Post date:** [August 9, 2026, 7:10pm UTC](https://ilgmforum.com/t/yellowing-leaves-during-flowering/122488/4 "2026-08-09T19:10:22Z")
On the fox farms feed chart they list flushing. Should have done it twice BUT it also says experienced growers can just monitor the grow. I think it’s a pretty good sign but I would need to know the history. ---
**Author:** ![Shellbell](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/shellbell/32/836523_2.png) [@Shellbell](https://ilgmforum.com/u/Shellbell)\ **Post date:** [August 9, 2026, 9:05pm UTC](https://ilgmforum.com/t/yellowing-leaves-during-flowering/122488/5 "2026-08-09T21:05:18Z")
How often do you water? ---
**Author:** ![RowdyRod](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/rowdyrod/32/881972_2.png) [@RowdyRod](https://ilgmforum.com/u/RowdyRod)\ **Post date:** [August 9, 2026, 10:44pm UTC](https://ilgmforum.com/t/yellowing-leaves-during-flowering/122488/6 "2026-08-09T22:44:32Z")
Every day/tested for need. ---
**Author:** ![Shellbell](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/shellbell/32/836523_2.png) [@Shellbell](https://ilgmforum.com/u/Shellbell)\ **Post date:** [August 10, 2026, 12:10am UTC](https://ilgmforum.com/t/yellowing-leaves-during-flowering/122488/7 "2026-08-10T00:10:11Z")
Im just a sow, grow and hope grower. I don’t do all the soil samples and testing. I know over watering can cause yellowing and the days are getting shorter and nights are longer so that could cause a change in leaves. They are thick and pretty plants tho. Nice big buds on top.