Watering the plants
The job of watering the plants is one of the most important and time
consuming tasks that a gardener must regularly do. Plants lose water
by evaporation through the leaves. Water is vital to a plants development
and without sufficient water levels plants will wilt. If the wilting
is severe or happens for a long enough duration then it can do irreversible
damage to the plant and it will not be able to recover.
When to water
You should water the plants at specific times of the day, either
in the early morning or in the evening. This is because if you water
them in the daytime then a lot of water will be lost due to evaporation.
Certain plants foliage is also at risk from scorching if watered during
hot periods.
Some prefer not to water in the evening during cooler periods as it
can contribute to the damp types of conditions that fungal conditions
can thrive in. Watering in the evening may also encourage damp loving
pests such as snails and slugs to investigate the watered area.
How can I reduce the amount of time needed for watering the plants?
To reduce water evaporation from the soil surface you can add a mulch
which protects the soil surface from the suns heat and also helps
retain moisture in the soil. Bark chippings are becoming an increasingly
popular choice for soil mulch but there are many alternatives including
manure, compost, straw etc.
By increasing the organic matter content of your soil you will improve
its water retention capabilities. Mulches such as manure are gradually
incorporated into the soil by worms and other soil organisms and will
help improve the quality of your soil, adding organic matter that
will help the water retention properties of the soil.
Plants in containers will need watering more often as there is a
smaller area of soil to draw water from. Terracotta pots lose water
through their sides via evaporation and so will need watering more
often then plastic pots. Hanging baskets are also very prone to losing
water through their sides and bottoms through evaporation. Both terracotta
pots and hanging baskets can be lined with polythene to help reduce
evaporation. If using this technique be sure to leave holes in the
polythene at the bottom where the normal drainage channel is so that
excess water can drain freely when watering takes place.
If planting in containers then use one large container rather than
two small containers.
How often should I water the plants?
This will vary depending on soil type, planting location, plant type
and so must be done using your common sense; there are however some
pointers which will help you assess when your plants need watering.
Check the compost in containers and hanging baskets. You should check
- Dampness of the compost. The compost surface should be slightly
damp surface to the touch, like a squeezed out sponge. If the compost
surface is dry then the container needs watering.
- Colour of the compost. A compost that is pale in colour needs
watering.
- Has the compost retracted from the container sides? If it has
then it needs watering.
Smaller containers will need watering more frequently than larger
containers.
When you remove a plant from its pot and plant it in a larger container
or open ground you should water it in thoroughly after planting. This
is because its roots will not initially have a grasp on the surrounding
soil and so it will not be able to utilize the water found in the
new soil.
Helpful hints for watering
- Compost that dries out and ‘bakes’ in the sun can
form a very hard ‘crust’. When watering this crust can
repel water and the water can run off the surface without penetrating
into the soil. If you add a drop of washing up liquid to the water
it will alter the waters surface tension properties and the water
will find it easier to penetrate the composts surface.
- Water at the base of plant around its roots as this is where
the water will be utilised. Water on foliage is easily lost to evaporation.
- Invest in a decent watering can with removable rose attachment.
Aim for a watering can that you find comfortable to lift when it
is full. The larger the watering can the quicker the job will be
but the more physical effort and strength is required to manoeuvre
it.