A key problem with spag as used by nurseries is how tightly packed it generally is. One major well-regarded grower is known to endorse tightly packing spag, but I haven't heard his exact reasoning and I don't subscribe to that belief, especially in light of the root condition of some plants I've received from him.
Spag can probably work well for most growers if it is packed loosely enough and is closely monitored. The skewer method is the most reliable way to know when to water. Stick a pointed bamboo skewer into each pot and leave it there. You then test periodically by pulling it out and feeling; if it's almost bone dry, then it's time to water.
I repot most new plants at the earliest opportunity, unless it's a small seedling and the spag appears fresh through the clear pot. You'll notice a near consensus on this board for repotting on arrival.
Currently, I'm using CHC (Coconut Husk Chips) in clear slotted plastic pots for almost all my Phal repotting.
I've stopped using styro peanuts at the bottom after too many incidents of accidentally tipping over a top-heavy Phal. Now, I use a small amount of river pebbles at the bottom to make the pots more tip resistant, as well as for drainage.
Last edited by Jayfar; 10-02-2011 at 11:45 AM..
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