Having Cold weather (below 50F/10C) can make phosphorous absorption very troublesome for plants. Always check your pH
Pretty much the overall dark green colour with a purple, red, or blue tint to the fan leaves is a good sign of a Phosphorus deficiency.
It aids in root growth and influences the vigour of the plant and is one of the most important elements in flowering as well helps to germinate seedlings.
When your plants are deficient in phosphorus, this can overall reduce the size of your plants. Causes slow growth and the plant to become weak, and causes slow growths in leaves that may or may not drop off.
The edges around the leaves can be brownish and working inwards a bit, causing the leafs tip to curl up. Fan leaves will show dark greenish / purplish and yellowish tones along with a dullish blue colour to them.
The Cure: Drmoli's Holi Moli Juice
To prevent deficiencies in your Plants use Drmoli's Holi Moli Juice. Just water your plants, with a mixture of Drmoli's Holi Moli Juice every 2nd or 3rd watering. Can also be used as a foilar spray.
WHAT EXACTLY IS Dr Moli's Holi Moli Juice?
A convenient All-In-One Bottle organic nutirients, of the highest quality. Great for All Stages of Growing. Veg, Budding, and Flowering. Great for Hydro and Soil. Environmentally Safe. - Prevent a Deficiency
Phosphorus supplements are: