Another pest that ruins the appearance of affected plants. Easy to detect but very difficult to kill off completely once they have made a home in the tangled branches of such climbing plants as stephanotis and hoya. One is often invited to visit the greenhouse of an enthusiastic amateur and see the wonderful range of plants being cultivated under one roof.

Many of these plant collections are managed extremely well but often enough an incredible infestation of mealy bug will be shrugged off with the comment, ‘Of course, there is a bit of bug about.’ The sad part of it all is that a thorough drenching spray regularly repeated would lead to considerable improvement.

Mealy bug is another pest that may be encountered. Not very particular about which part of the plant he inhabits, he does have a penchant for finding his way between twisting stems and overlapping leaves where he can he particularly inaccessible to any pest control that may be used. One consolation is that mealy bugs are not difficult to see, as they wrap their young in a cotton wool-like substance. Adult bugs are very similar to small wood lice and powdery white in colour.

Abide by the fertiliser manufacturer’s instructions and better results will be a little larger, and procure a properly balanced potting compost. It is seldom, if ever, that one sees good-quality plants growing in what is often referred to as garden dirt. Composts should contain peat, sand, fertiliser and all sorts of other ingredients if potted plants are to do well.

There are many varieties of adiantum to choose from, all of them delicately beautiful, reasonably easy to care for and supremely adaptable. Plant them in dish or bowl gardens, as individuals to stand on top of a pedestal, Or in hanging baskets. To see them at their best the latter method cannot be bettered.

Like fertilisers, all insecticides should be used as instructed, as that seemingly harmless little extra may well cause leaf scorch and other damage. Pests should be treated as soon as they are seen, as any delay will make their control just that much more difficult.

A number of indoor plants may be propagated by this method, and it is also an excellent way of reducing the height of rubber plants which are getting out of hand. Plants are air-layered simply by removing a section of the outer bark and wrapping a handful of wet sphagnum moss around the exposed area, or by making an upward cut through the main stem and wrapping wet sphagnum moss round the incision.

Relax; it is not nearly so dreadful as the foregoing may suggest. In actual fact the house plant grower is not too much troubled by pests, and if you follow my earlier suggestion about purchasing plants from a reliable source then the chance of introducing pests to your collection of plants is further reduced.

Fortunately, the majority of really poisonous insecticides are not available to the general public, but even those that are considered safe should be handled carefully. Certainly, when handling insecticides rubber gloves should be worn as general practice, and any plants that need treatment, particularly with a liquid solution that is sprayed on, should be treated out of doors.

On most varieties stems will, quite naturally, become leafless and woody in time. When this happens and the plant is no longer attractive the stems should be cut to within a few inches from their base. Keep the potful of stumps as they usually grow again from the base. The stems can then be cut up into sections some 2 to 3 in. in length.

After dusting the ends with rooting powder the cuttings should be pressed horizontally into a seed box filled with moist peat until the pieces of stem are almost covered. Any growth buds (small swellings on the stem) that can be seen should be uppermost. As soon as the first two leaves have opened, pot into 31-in. size pots. Many dracaenas (D. Redcdge in particular), and philodendrons with larger leaves can also he propagated in exactly the same way.

Dracaena massangeana is one of the more impressive foliage plants though space demanding, but good value if the room can be afforded. When freely planted in beds of compost or when growing in their natural habitat they become quite substantial plants.

Aglaonema is widely distributed in South East Asia. 16 to 2eC. (6o to 70F.). The suitable temperature for Aglaonema is less than 16C. (60F.); for a short period this may do little harm, but it is essential to provide adequate warmth if these plants are to do well.

A. rhodocyanea is one of the most exotic and unusual of all potted plants. Large, strap-like overlapping leaves form a perfectly watertight urn (hence the common name). When purchasing, look for plants with lighter grey colouring as the darker ones are less attractive. To prevent damage to the natural grey bloom on the leaves it is important to ensure that they are not cleaned or rubbed in any way.

When buying plants in flower it is best to select those that arc more backward in order to get the longest life possible from them. The ideal stage is when the pink bract is a little above the water level in the urn. Plants that have developed to the stage where the blue flowers in the otherwise pink bract are fully open should be avoided.

The larger leaved ivies are better where a bolder effect is sought, but all these are vulnerable to red spider mite in hot, dry conditions, so a watch should he kept for their presence.

As the name suggests, II. Mini Green has smaller, more congested leaves that are crinkled at the edges. Of the variegated plants for outdoor use, and as durable indoor plants, the best small-leaved ivies are those with basically grey colouring.

Ivies may he used for almost every purpose, as trailing plants, upright plants on stakes, climbing plants against the wall or, very effectively, as hanging basket plants. In this respect they may he used in conjunction with other plants, or as individual specimens filling the basket.

Surprisingly enough anthuriums are, on the whole, not too difficult to raise from seed provided it is fresh and sown in a temperature approaching 27C. (80F.). When large enough to handle the seedlings should be potted not into soil, but into a mixture of coarse pear and rough sphagnum moss; to help things along try soaking-the moss in liquid fertiliser at standard strength for 24 hours before using.

It is also helpful if plant pots are plunged to their rims in peat or moss beds, below which there should be permanently warm pipes, or soil-warming cables can be run through the bed. In common with most members of the aroid family this anthurium will develop aerial roots on the main steirk as it extends in, length. If these are left unattended to dry out in the atmosphere then the plant will suffer.

Ant huriunz czysta Ilinztin is grown purely for its truly superb leaves. This is a plant when the beginner would do well to ignore until he has acquired some degree of skill with simpler subjects. In the greenhouse collections of many enthusiasts some surprisingly fine plants are grown, but it is seldom, if ever, that reasonable specimens of A. crystalli num are seen. Frequently the reason for this is that the grower tends to care for these plants by potting them very conventionally in standard pots, when it is infinitely better to grow them on a moss-covered raft.

As in the case of Azalea indica, the most important requirement of hydrangeas when grown as pot plants is water. They must be kept moist all the time and this usually means a good watering every day, but it is important that the water drains away freely ; they should not be allowed actually to stand in water. Purchased in the spring of the year hydrangeas are very little trouble if kept in a light, cool room and watered and fed regularly.

In good growing conditions plants can be very invasive, so will need hard pruning any time after flowering. Mealy bugs can be troublesome pests should they find their way in between the twining stems of the plant, so a careful watch must be kept in order to eradicate them before they have a chance to get established.

The simplest way to increase plants is to peg shoots into small pots in the form of a layer, cutting them away from the parent plant when they become established.

By planting in very acid, peaty soil the blued varieties will retain their blue colouring; in ordinary soil they will revert to pink. Alternatively, the soil can be treated with alum as required.

Truly miniature and one of the most graceful of all foliage plants, Cocos weddelliana has in recent years been in short supply. A regrettable state of affairs hut, like all these attractive slow- growing plants, once the demand exceeds supply it is very difficult for the producer to catch up. However, having traced a supplier and persuaded him to part with a plant, the owner should provide a moist situation in a light, warm place.

Plants may be raised from seed sown in warm conditions, or from cuttings of side shoots inserted in a warm propagator at a temperature of not less than 22C. (72″F.). Clianthus ilampieri, the glory pea, requires special treatment and is very much a task for the experienced professional; having weak roots it must be grafted on to seedling stock of Colutea arborescens.

The common name gives a clue to Codiaeum; and it is indeed a plant of many colours that outshines every other species in foliage colouring. For years now we have been advised that codiacum is the proper name, but the old one of croton is still favourite with both nurseryman and general public.

Perhaps because of the amusing common name, or more likely on account of their reasonable price, these are among the most popular of all flowering indoor plants. With good care and regular potting on into slightly larger pots they will attain a height of several feet, but they are usually considered to be compact, low-growing plants.

The tender jasmine is not a particularly interesting pot plant but is, nevertheless, frequently offered for sale during the second two months of the year. No doubt pleasantly scented white flowers help to sell the plant in spite of the fact that they are short-lived.

When potting on ensure good drainage by putting a layer of crocks in the bottom of the pot, use a rich compost and pot fairly firmly. Although the leaves mar seem tough to the touch they are very easily damaged if chemical leaf cleaning agents are used at excessive strength – one should experiment with new cleaning materials before treating the entire plant.