Horsemanure and topdressing with straw and hay is good practice when growing outside, as for consumption after harvest, RSO (Rick Simpson Oil) can be a bit of a hassle to make, but I have found that just cooking your ground dried bud in an empty covered pot sitting on top of a bigger pot with boiling salted water for 3 hours works great too for decarboxylation and preserves more of the good stuff than when heating higher. Make sure the water touches the bottom of the pot. Check on the water level every half hour and add more as necessary. Doesn’t matter if it stops boiling for a couple of minutes.
Then just eat a teaspoon at a time, up the dose to 2 or 3 teaspoons a day, or as much as he can handle.
Cutting out coffee, alcohol, red meat (gradually) and starting the day with salted warm lemon water will speed up recovery too, along with yoga to increase bloodflow.
Add organic super foods to the diet: spirulina, red beet, black radish, nettle, dandelion flowers, etc.
Godspeed to you and you father! And above all, fear not. Fear is the real killer. Our bodies are immensely powerful, but they follow our beliefs, assumptions and convictions. The cells of our body are in direct electro-magnetic connection with our every thought. So keep a clean head. A positive mental attitude and faith in what nature has given us makes all the difference.
Also plant some garlic, onion, basil and mint around your plants to confuse pests.
There’s also affirmations, to say upon waking: “I am healthy. Dear body of mine, glucose only for the benevolent cells, for I am magnificent and I am loved.”
May feel a bit strange in the beginning but loving yourself enough to turn destructive habits into benevolent ones is really the key to it all.