Early leaf discoloration

I suspect a ph problem but have no means of measuring.

The soil is with compost and synthetic fertilizer, some sand and a little perlite. It's PH is listed at 5.8 and i have not added anything but water.

I have been watering with tap water and melted snow.

I guess the soil might be getting too acidic?

Any advice on diagnosing and fixing is aporeciated.

As it is now i am considering adding some baking soda with water next time.

The pots are ~ 0.7g and i was thinking of trying 1/4 teaspoon of the soda with each watering.

Don’t add baking soda. Don’t do anything but water. You don’t have a PH problem.
How old is the plant, how many leaves affected?
Your soil may just be a little hot.
Or it may be nothing but a plant getting it’s footing.

drsaltzman said:

Don’t add baking soda. Don’t do anything but water. You don’t have a PH problem.
How old is the plant, how many leaves affected?
Your soil may just be a little hot.
Or it may be nothing but a plant getting it’s footing.

Click to expand...

Thanks a lot.

The plants are 2 weeks old. There are 3 plants, 2/3 are affected and on the affected plants this occurs on a couple leaves that are lower growth.

The soil might be a little hot, i could see it being the case as it has been warmer than usual lately.

Icu420 said:

Thanks a lot.

The plants are 2 weeks old. There are 3 plants, 2/3 are affected and on the affected plants this occurs on a couple leaves that are lower growth.

The soil might be a little hot, i could see it being the case as it has been warmer than usual lately.

Click to expand...

Soil being "Hot" means to much nitrogen not temperature

Let ‘em ride.
They’re just figuring it out right now.

Sometimes, no matter what you do, you'll see something somewhere on a leaf As drsaltzman says, just let em go + whatever you do, don't add baking soda, or do something trying to guess or fix pH levels. You'll do more harm than good. The pH levels in soil are much more forgiving and manageable (especially for beginners) than they would be in a hydroponic setup. It's a bit hard to measure pH in soil anyway, and you'd have to measure the runoff after watering your plants (what comes out the bottom). If you want to check it, then go to Ebay and spend $10 for a 'Portable Digital LCD PH Meter Pen' - I use these meters, as long as you calibrate them they are fine. Once again, pH levels in soil are pretty forgiving, and you should be between 5.5 and 6.5 pH in soil. Good luck with your grow!