You will have to transplant the blocks into larger containers or blocks now. The longer you wait to do it the more damage that will be done. Transplanting prior to true leaf developments is done all the time by experienced growers. Waiting for true leaves is just a guideline used for those new to growing from seed. Dave

Felt by the yard from Wally World. ;) Dave

Judy - are you Judy G. I know - or another Judy? ;-)) They do OK when small, when they mature it will become a problem. The main thing - do not let soil become dense and waterlogged. Mix your AV soil - Cornell mix - with 50% of coarse perlite. Put a good layer of perlite on the bottom of the pot - I put wicks too - use this soil and make the rootball stick out of the pot - so the strep is sitting like a king of the hill. Watch for signs of waterlogging - young leaves develop mushy yellowish edges. Usually it happens with time when the plant develops lots of roots and the soil gets compacted. Seems that there are less problems if you grow them not on the mats - but either in Oyama pots - or even on reservoirs - provided there is a space between bottom of the pot and water - so the roots have an extra air access. I saw superblooming streps our late Anne G. used to grow on top of margarine tubs with wicks hanging through the hole. Seems that they need more alkaline soil - since in the nature they grow on the slopes of limestone hills - so a pinch of dolomite added to the pot is a good idea. But - I think that for another month you are good. It is when you are ready to pot them up you need to do something different. irina

Gardener's Supply now carries what they call "English Capillary Matting" that might be just the right size for an apartment-sized project (3-yard roll @ $15 - follow link below). It doesn't say what it's made of, so don't know whether it's the same recycled polyamide fiber cloth that Patrick Blanc uses, but I'll bet it's good enough and affordable enough for the purposes of experimentation. I've also heard Blanc's irrigation cloth referred to as "synthetic felt", but again it is important to know what the actual materials are that make it. If you purchase this or some other capillary matting, it could also serve a dual function as indoor seed propagation mats for growing the plants selected for the living wall, particularly if one has budgetary concerns and can't afford to purchase all the plants from a nursery. There are also Accelerated Propagation Systems (APS)available for easy indoor propagation, as discussed here: http://www.conngardener.com/samples/propgate.html Sounds like a fun project. If you or anyone comes up with a supplier with larger quantities and sizes of the appropriate polyamide fiber matting materials (perhaps used for green roof installations or roof gardens as well?) then I hope you will share it with us all. Here is a link that might be useful: Gardener's Supply Capillary Matting