WAHGA Jobs for April

It’s been a warm, dry March, very different to the wet spring of 2024!  Be ready for a busy few months in the garden and allotment as now is the time for seed sowing and planting.    However, even though it’s mild, there may still be some frosts through into May, so be ready to protect any young  seedlings, and definitely wait to plant out your runner beans and courgettes! 

PREPARATION

Remove any perennial weeds by digging out the roots, and regularly hoe any annual weeds.  Layer on plenty of organic matter to enrich the soil, improve the water holding properties and increase aeration.  

Warm the soil my laying black empty compost bags on the ground.   Ideal preparation for sowing parsnip seeds in particular. 

Now’s a good time to look at your fruit trees and take a few photos of the whole tree and branches with blossom.  This will help decide what to prune later, particularly for stone fruit which can be pruned soon.

PLANTING

Early potatoes can be planted now, followed quickly by second earlies.   The main crop should be planted by the end of April.  ‘Earth up’ any emerging shoots with soil if a frost is forecast.   Potatoes can also be grown very successfully in containers or under cover of barley straw.  

Plant onion/shallot sets & garlic bulbs; choose a sunny site with good drainage so that they don’t get drowned in the rain.

Plant asparagus crowns in beds already prepared.  Though it will be a patient 2 year wait before spears can be harvested, the crowns will reward you for 10 years, with little more effort than mulch and weeding.

Fruit plants such as raspberry canes, currant bushes and gooseberries can still be planted now for a crop this year.  Any fruit trees should be on dwarf stock, unless in your own garden of course! 

SOWING

Sow Indoors/undercover 

Sow aubergine and red pepper seeds now, they take a long time to fruit in typical English conditions, so the earlier you sow the better. 

Tomato, sweetcorn, courgette/pumpkin/cucumber family, tender beans such as runner and French, chard, kohlrabi, celeriac, tomatoes can all be sown now under cover and kept in either a greenhouse or sunny windowsill before planting out in May, when risk of frost is over.  

Save money by sowing herbs, flowering annuals and herbaceous perennials for the garden.  The easiest are also rewarding, such as sweet peas, cosmos and poppies.  You can just scatter poppy seeds in the garden - they really are as simple to grow as that.

Pot on the strongest seedlings when two true leaves have formed.   Hold seedlings gently by a leaf and pot on/transplant straight away. 

Direct sow outside now

Top Tip - when sowing direct outside spend a bit of time getting the seed bed flat.  This ensures that water settles evenly and that seeds don’t wash away or dry out.

Carrots, radish, spring onions, beetroots, turnips - sow successionally to  allow harvesting of young crops through the season.  

Carrots need protection from carrot fly, use horticultural fleece to cover the crop.  Alternatively grow them in a container over 1 metre high filled with sieved soil as carrot flies will not be able to reach the plants.   

Radish, spring onions and beetroot do well in the ground or large pots and don’t need covering.

Parsnips can be sown now, though they can be slow to germinate, it’s best to warm the soil first by covering with a black compost bag or similar, or just to wait a couple more weeks.  Allow 3-4 weeks before you give up and sow a second time.  Use fresh seed every year, unlike many other seeds, they do not store well.  

Sow peas and make the last sowing of summer broad beans.   Birds love peas so these may need covering later in the season. 

Towards the middle of the month start sowing, every two weeks, mange tout and salad leaves. 

If a heavy frost is forecast cover your seedlings if you can.

MANAGE PESTS AND DISEASES

Check broad beans for the first broods of aphids; prick out the tips of tall plants as the aphid hatchlings can only eat new growth.  But look out for ladybirds as they are coming out of hibernation and laying broods of hungry aphid ‘eating’ larvae.    Don’t be tempted to use insecticides as this will kill beneficial insects and bugs as well.  Aphids are also the perfect food for many bird hatchlings so encourage nesting birds with bird boxes and safe nesting spots.

Protect any early strawberries from birds with netting that is wide enough to allow pollinators in. 

Get rid of slug hidey-holes with a good tidy up of “stuff” - pots, old compost bags, this helps to limit numbers as they have nowhere to hide.  Try a beer trap, and another option is using nematodes - have a look on-line.  Nematodes work particularly well in an enclosed  garden.  There are some beneficial slugs, such as the leopard slug, which only eat dead matter, these are essential in nature for helping the composting process. 

WILDLIFE

Hedgehogs are coming out of hibernation and will be on the hunt for nutritious food to put back the body weight lost over winter.  They may still be sleeping in your compost heap so take care when moving any compost or piles of leaves.   They will still go back to the hibernating spot on colder days and at night.   They can eat tinned cat food and kitten pellets but don’t leave milk as they are lactose intolerant, so just leave a shallow dish of water.  If you do leave food, just a small amount and ideally in a location where other animals, like foxes, can’t reach it.

We are well into nesting season so watch out for activity in trees and hedges near you and don’t disturb.   If you are cutting hedges and trees please remember that it’s illegal to cut anything down where there is evidence of a bird nesting, or nesting activity - and that includes pigeons!

Wildlife Aid is a charity in Leatherhead which provides a rescue and treatment service for wildlife.  They will give advice on any wildlife in distress, so do seek their help if needed.   Their number is 01372 360404 and website https://www.wildlifeaid.org.uk/

Leave water dishes out for the bees and the birds. 

Baby birds cannot digest whole peanuts, so crush them or put into tight mesh feeders. 

Sow a few wild flowers in a section on your plot or garden to encourage pollinators. Try planting asters, camomile, marigolds, oregano, sage, sunflowers, thyme, yarrow and zinnias. The entire Compositae or “daisy” family will attract a number of beneficials including ladybirds.

HARVEST

You may be lucky to still have some broccoli, kale and chard, but the plant of the month is rhubarb!  Pull (don’t cut) the ripe stalks, compost the leaves.  Don't forget to cut any flower stalks off as rhubarb flowers rob the plant of energy and you’ll get a poorer crop.   

Asparagus will also be coming through in April, make sure you cut the early spears to encourage more to come through.

IN THE GARDEN

If you haven’t done so, find a dry day to do the first cut of your lawn, on a high cut.    Feed the lawn, and sow bare patches with seed.  

Beds and borders will also benefit from a feed;  sny slow-release multi-purpose feed will do.  And mulching now will help suppress weeds and retain moisture later in the year.

Cut back any herbaceous plants - you should see new growth coming through, and ornamental grasses.   It’s also the perfect time to divide herbaceous plants, giving spares away to friends.  If you don’t divide the herbaceous plants they eventually spread out from their original spot dying from the middle.  April is the last chance to prune hydrangea to ensure good blooms. 

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