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Smaug
June 21, 2018
There's a major distinction to be made between overwatering and thorough watering. The damage from overwatering is largely due to exclusion of oxygen from the root area and (related problem) the growth of various molds. These things take some time to have a negative effect- overwatering needs to be chronic to do significant damage. There are, of course, exceptions, but they are plants you're very unlikely to be dealing with. If a plant is properly potted (both the soil and the pot must drain easily) there's little you can do in a single watering that will harm it. If you water a pot by pouring water on it once and letting it drain through the soil probably won't reach it's maximum hydration; this is usually fine for day to day watering, but if you're going to leave it, best to maximize. One important point- dry soil will tend to reject water; worst case scenario, the soil dries up and pulls away from the side of the pot, resulting in the water simply pouring off down the sides and getting nothing to the root zone. Leaving it out in the rain is the best way to water, but a shower makes a good substitute. Give it about ten min. of gentle water flow- this will not only get the plant watered, it will wash off the leaves and can be very annoying to a lot of plant pests. Another method is to leave the plant in a saucer of water and let it suck up what it will. Do NOT leave it there long term, but an hour or so will do no harm. Or you can just pour water on it in the ordinary way, but repeatedly. Showers or bathtubs can also be a good place to keep your plants for a vacation- they tend to stay cool and hold moisture, and be out of a lot of direct light. Digital timers are easily available- if you have an outdoor area, you may be able to set up your plants with a sprinkler to go off at some reasonable interval. Be careful of light moving plants outdoors- glass blocks most ultra violet light, and even sun loving plants will need time to adjust to full spectrum light. There are a lot of products available (self watering pots and such) to address this problem- I have no experience of them and am not crazy about the idea, but I suppose they work for some. Some people also leave their plants sitting in water- I find this practice horrifying, but as a last resort, it's better than sure dessication.
M
June 21, 2018
Love the long shower idea. Maybe this time around, I can remove the little white pests from my lime tree for good!
Smaug
June 21, 2018
Good luck- there are several little white pests, but the two that come to mind are whiteflies, which are infinitely tougher than they look- they'll fly away under a shower, but I've actually tried it for getting rid of them- they'd come back and the eggs wouldn't be affected. Pyrethrins are effective on them, but have no residual effect- it will require a regular spray program to get rid of them. The other is mealy bugs- these aphid relatives are covered with a cottony coating; they tend to gather in leaf axils and seldom move visibly; they can be dealt with effectively with a q tip (or other swab)dipped in rubbing alcohol. They can also get established on root systems in very dry conditions- they're a particular problem with succulents grown indoors.
M
June 24, 2018
My tree has got citrus mites, I believe. They disappeared for a while after lots of spraying and light insecticidal soap, but have come back, slowly webbing up the tree.
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