Whats going on?

[Burgerketchup]

Does anyone know whats going on with these plants? Is it phosphorus deficiency, Ph issue, low light, over watering?

I recived 7 plants from a friend and they had many issues, septoria, spider mites and were in a sandy very compact medium. I removed all the damaged leafs and sprayed with potassium neem, repotted in a half choir and have promix, fed them some organic earthworms humus. Today I woke up and found two of the plants new growth yellowing and turning what looks like purple. The plants are not burnt, the leafs or not crispy they are soft and discoloured. im running 1000w LED lights in my green house as suplimemtary lights. Im in colombia, south America and we get lots of sun. the temp is about 30 degrees Celsius, humidity is around 50-50% and my run off is 6.5ph.

[Mr.furley]

Always start with pH, then move to deficiency/toxicity.

In your case you have bugs that need to be addressed first.

[uglygangaguy]

You defiantly have issues. First off - what type soil/mix? What are they planted in? Is your light pulling a 1000 watt actually? Need more info. Always PH your nutrient water BEFORE giving to plants, not runoff.

[Bluey]

The first plant I killed, which was my first ever indoor grow 38 years ago under a 600w MH in a cupboard with zero climate controls in my mother's house, turned completely purple just before she lay down for good.

Good luck.