You probably will not heal the land with pheromones. For one, did you see all the 15k land tiles? That takes a lvl 7 pheromone. And your flowers do not produce that much, at least not lvl 5 flower beds.

Look out for dead tiles. You cannot heal them. You have to pull the item out. Nastily there are some lingerie items on those. You have no brothels there, so do not upgrade or harvest your lingerie hastily.

Pulling out many items is probably best method. Saves a ton of healing power.