Overview: In the Beechgrove garden, Jim is hoping that the soil is now warm enough to plant tatties in the main veggie plot, while on the decking garden Carole is also planting tatties on a tiny scale. Chris and Carole are going on very different fungal forays in Beechgrove this year. Chris is creating a whole Jurassic Park fungal valley with ancient timbers and all manner of edible mushrooms. Again on the other end of the scale, Carole tries out some windowsill mushroom-growing kits. George visits Alan Shamash's impressive hillside garden full of an extensive collection of rhododendrons in Kirkudbright.