Hello,
My lilac potted plant is dying i am not sure why but i think its because the PH lever is very low. 2.5
Can some one please tell me whats the best solution:
should i just add compost to the pot, add lime or change to a new poting mix?

Welcome to the site!

A photo would help!

Kval885
Can you show us pictures and say a little more about its environmental conditions—how old is the lilac, how big is the pot, how long has it been in the existing soil, what kind of soil, how do you fertilize, etc?

pH 2.5 is equal to gastric acid or lemons. I think your lilac's roots would shrivel up and die if your soil were that acidic. How are you measuring it?

Thank you all so much for replying so quickly.
I will add a picture later on today.

I have had this lilac for 5 years, got it as a small shrub. To be honest I have not taken care of it. But would really like to save it.
Its been potted in a large container with regular potting mix in the balcony. I have not been fertilizing it except once or twice with bone meal.
I had just purchased and tested with Moisture Meter Light & PH Tester tool and it showed 2.5 so I am assuming its something with the soil

kval885 said: I had just purchased and tested with Moisture Meter Light & PH Tester tool and it showed 2.5 so I am assuming its something with the soil

Hopefully that meter is wrong. As NMoasis said, straight lemon juice. Lilacs do best in slightly acidic to slightly alkaline soil.

Based on your description, I'm wagering your lilac needs fresh soil and proper fertilizer. Post photos, then we'll get specific.

Bone meal provides phosphorus and calcium mostly. It is pH neutral. I would use a general purpose fertilizer instead. I use some fertilizers with a NPK Ratio of around 10-10-10 (or with a slightly higher mid number for phosphorus) for lilacs. Not sure what type of potting mix you used. Most/all? potting mixes do not get their pH down to 2.5 though; maybe 4.5 if prepared for blueberries, azaleas and rhododendrons. So hopefully the reading from your kit is not correct. See if you can test the kit against a benchmark using very pure distilled water, whose pH is close to neutral: 7.0 (expect the result to be fractionally high or low only though). Get another unit if this one gives you incorrect results or ensure you follow the directions more closely.

Believe you need a much larger container, plus a a change of soil, like the others suggested, do we know what the name of the Lilac is?

Poor thing. You're going to have to change a few things, a couple now, the rest after it blooms.

It needs more sun and water right now. Is it outside? If it's indoors it probably needs a full, unfiltered southern window, but I've never heard of growing lilacs indoors, not sure it's workable.

Feed it with a balanced liquid fertilizer according to the product's directions, not stronger. Plain old regular Miracle Gro is fine. Do that now. DO NOT use a dry organic product designed for use in outdoor garden soil; the potted environment will not break it down to make the nutrients accessible to the plant.

Then wait for it to flower (if it does) and fully leaf out. While you're waiting, read about lilac care. Then you'll want to prune it properly and repot in good, well draining potting mix. The existing pot looks a bit big; you might want to downsize an inch or two. Check in here in a couple of months with an update about whether it bloomed and we can help to with future steps.

To add, just saw Crawgarden's suggestion re bigger pot. Honestly, it's hard to tell how big the root ball is on that spindly shrub. Maybe not necessary to downsize as I mentioned, but I'd be hesitant to go bigger.

Sad little thing, I would think it should be much bigger after 5 years.

Its so stringy, I honestly thought it was a wisteria.

It needs to be put in the ground . I have never seen one in a pot .

Your meter is wrong. It could never survive soil with that reading and you would have to work very hard to make soil with that reading.

Thank you everyone for your helpful suggestions.
Over the weekend i had replanted my lilac ( was not root bound) with new soil, trimmed the dead branches and added fertilizer. hopefully it will survive .
thank you again!