heat friend,the cloth might be great inside,but not outside unless you can stay on top of it,the ground provide all needed and dont need much feeding from the roots searching for moisture and produce mass roots,clay in that soil holds water and when you think it dry it not,dig a hole in dead ass summer and measure how deep you go before you find moist soil,probally about 6 to 8 inchs deep,right were the roots are the strongest,for next year,get you some plots amended if needed,you would be surprised what you stand on and call shit dirt ,dont do this in a indoor grow kind rap going on,you would be surprised the outcome of that test,adding perlite to ground,hell no just opened a can of worms of having to water all the time,moist soil will feed that plant it only take what i wants,leaf health test is were it at,it will tell you exactly what the plant is up taking,if your low on something threw this test then your not spending money and wasting on other things,if it shows your def in P why would you add a fertilizer that has even across the board NPK values to that plant,you just increase the problem if you dig,if you have established soil and water for your one week holiday it will probally just be showing signs of need of water if you dig,as i gorrilla grower you find out real quick visiting your crop will bring attention and they will let you grow the shit out of it,just about a week before your gonna harvest bamm they gone,you think they give a shit thric are ready hell nah they wont the plant,ive went couple weeks without visiting and spent the night at grows just to work them and water next day were im not spotted,folk dont have peatience to wait all night to see were your at,ninja style baby hahahah