This sounds simple enough and, indeed, is so, if a few cardinal points are always observed. Keepclean; wash them inside and out when putting away after use. Also wash the crocks and do not stint them when up. Do not use large pots for and small plants, but just large enough to give room, with 1 in. of soil to spare all round. See FLOWER POTS for sizes of pots. Note that there is a type of plant pot which does not require crocks, as it has a number of slots cut diagonally to furnish both side and bottom . These pots are made from a fibrous material treated with a synthetic resin and have several advantages compared with the traditional clay pots, e.g. they never break when dropped, are very light in weight, can be steam sterilised and even boiled, are unaffected by frost and breathe very freely. As a rule do not pot in rich soil; that can be done when they are established. In most cases, however, the John Innes Composts available from seedsmen will cover requirements, thereby avoiding the necessity of preparing elaborate mixtures at home. See COMPOST. Related to is the of seedlings. This is sometimes done by placing the pots in a tray or zinc bath containing 1 in. of water (witli the off) to let the moisture soak up through the pot-hole. A better method is to plunge the pots to their rims in water until the pot is soaked but not drenched. Don’t fill with soil to the top; leave 1 in. for watering and, when seedlings are established, for filling up with richer soil as needed to nourish the and support the growing . When show through bottom of pot it is time to re-pot into a larger size. This is called potting-on. Potting-off, by the way, is transferring seedlings from boxes to pots, and the process of doing so is . In , tap the side of the pot to loosen the earth, then, with a finger at each side of the stem, invert the pot, and press out the root and ball of earth by pushing a twig through the pot-hole. Keep the earth round the root, and, having first crocked the larger pot, and given it a layer of soil at the bottom, put the transferred plant and its ball in, gradually filling in all round, pressing in as it is done so as to avoid unfilled spaces. Do not re-pot when soil is dry.