Sulfur deficiency ? 54 days old cheesecake auto

Hi everyone,

I’m growing a wedding cheesecake auto, it’s 54 days old now and since 2/ 3 weeks in flower. The plant has been growing awesome during veg but since 5 days I’m seeing a noticeable overall yellowing/ lime green color of the leaves but the older one don’t seem so much affected as the upper part of the canopy. On a few leaves, some yellow spot appeared in the middle (not on the edges).

I’m using soil (cellmax bio soil) amended with fermented Bokashi and 5-10% worm casting. Until now I just used an organic nitrogen fertilizer 2-3 times as preventive measure and some molasses during veg. I always Ph my water around 6.5 with some effective microorganism (EMa). A few days ago I also gave it a shot of homemade banana fertilizer (banana+brown sugar fermented 3 weeks) to boost flower production

I measured the run off yesterday as the yellowing was getting more obvious. Water was at ph 6.5 and run off 6.9 so not really out of range for living soil.
Now I’m thinking about a sulfur deficiency.. Here is a photo of the plant from Saturday but I will take and post new photo tonight so you guys can see the evolution of the issue.

Can anyone help me ? Should I give it a shot of cal/mag or epsom salt ?

cheers

It seems to have gone worst since Saturday. Here are some more photos. We can see the yellowing fan leaves in the middle/ top part of the plant and the yellow/ burned spots on 2-3 of them. The big fan leaves at the bottom seem to be healthy tho.

Some details I forgot about environnement: temperature is 21-22 at night and 26-27 lights on. Light mars hydro ts1000 at 100% power 25 cm above the highest flower. Humidity 50-60% RH, a fan and a humidifier are automated based on vpd value and keep it around 1.2-1.3 kPa.

Any idea ?

That looks like a decent soil but on their website it says "vegetable fertilizers for 4-6 weeks". You're at almost 8 weeks. The plants are flowering and are using more nutrients to develop the flowers. You're probably going to need more than bokashi and banana peel tea to keep them healthy and lush until the end.

Have you thought about using their 2-2-5 organic bloom fertilizer that contains trace elements?

I've never used their products but from what I read on their website it might be that the soil is just running out of gas.

Good luck.

Thanks for your reply. You might be right with the soil getting empty of nutrients as it makes sense with the timing.

I wasn’t expecting this tho. With the amended bokashi I mean bokashi compost. I’ve mixed 2 parts cellmax soil with 1 part fermented foodscrap (potato peels, vegetables, eggshells, fruit peels, green cuttings from the garden). I composted the whole thing for 3 months and I know it was ready because the ph was stable after a very busy acid environment at the beginning.
I grew a lot of hungry vegetables with this process. It’s the first time I try with weed tho.

Do you think even with so much compost it would run out of nutrient after 8 weeks ?