Help please.

[IamSnorlax]

Apologies if this is in the wrong section. First time grower here. I am growining a Fastbury auto, in a general indoor potting mix, under a TC600 Vibraspectra in a 3x3 tent. Water only for the first week, then 1/4 strength nitrogen rich fertilizer. Week 4 (or when buds start appearing) swap fertilizers to a high potassium fertilizer. It was around week 4 and 5 I first started getting "burn" and "mottling" on the leaves. Pictures attached. Any advice?

 

[derek420colorado]

Can you post pictures of the whole plant please? Also fill this out. It helps tremendously


Problem:

Medium/grow method:

Feed: and supplements used:

water source:

Strain/age:

light used:

Climate:

Additional info:

 

[IamSnorlax]

Problem: Mottled and dying leaves.

Medium/grow method: indoor/standard potting mix.

Feed: water only for the first week, then 1/4 strength 8N 1.6P 3K strength liquid fertilizer. Week 4 (or when buds start appearing) swap fertilizers to a high potassium fertilizer N5 P1 K 9. 1/4 strenght.

Water source: dechlorinated water.

Strain/age: plant in the picture is Fastbury auto, 8 weeks old.

Light used: TC Vibraspectra

Climate: Temperature usually sits at a constant 25 celsius (77F) and humidity about 55%

 

[derek420colorado]

Ok I should have been a little more specific I’m sorry. Can you take a pic in natural light? The leaf and plant color is vital to diagnosing any problems. Again my bad

 

[Mañ'O'Green]

Looks like a phosphorus deficiency to me. 5-1-9 is too low in P. Look for something closer to 1-2-3 in flower (3-6-9, 4-8-12, 5-10-15 etc.)