Water every 2-3 days for the first month.After that, a good watering once a week should besufficient, but monitor it often as windy days can dry outsoil quickly. If the tree is fall planted, water oncea week when no rain or snow cover is provided.
Crocks in the bottom of the pots are a good idea.Loam based compost such as John Innes No 2 is best together with abark mulch to help avoid water loss. Watering twice a day in hotperiods is essential. Feed with a balanced proprietaryfertilizer in spring just as the leaves emerge.
The most common reasons for leaf scorch are unfavourableweather conditions, such as drought, high temperatures, hot drywinds and excessive sun exposure. However, frost and waterloggedsoil may also cause the condition, also referred to as abiotic leafscorch.
Causes of Brown Leaves Range From Too Much Sun toNot Enough Water. Over-exposure to sun can result in brownleaves, a phenomenon also known as "leaf scorch." A hotsummer can leave even established specimens that are too exposed tosun with brown leaves, especially if other debilitatingfactors are present.
Acers need well-draining (but not dry)soil, with plenty of light and, most importantly, a greatnutritional profile to help growth and foster those stunningscarlet leaves. As such, most gardeners choose ericaceouscompost for acers, and many opt to use a specialisttopsoil too.
Quick tips
- Keep plants moist and in the shade until planting.
- Soil preparation with organic matter is important, especiallyif the soil is heavy clay.
- Mulch with 6 inches after planting to reduce the need forfrequent watering and protection of their shallow roots.
- Keep pruning of newly planted trees to a minimum.
Acer henryi
Grow in a sheltered spot in full sun or dappledshade. Height 3.5m.Soil and water are the two most important factors formaintaining healthy Japanese maples. So maintain ahumus-rich soil by applying coffee grounds. Coffeegrounds are free at Starbucks. For a 4-foot-tall Japanesemaple, I recommend applying 4 pounds of coffee groundsper tree per season.
How to Save an Almost Dead Japanese Maple Tree
- Look for leaf scorch, which makes the tips of leaves curl andturn brown and will eventually kill the tree.
- Turn over leaves and check their undersides for insects likeaphids, which love to chew on Japanese maples.
- Check the soil conditions and make sure the soil drainsproperly.
Tip 2 Fertilizing your Japanese maple withthe proper type of fertilizer should be done either in latewinter while the ground is still cold (frozen?), or after the lastfreeze in spring. I recommend using a slow or controlled releasetype fertilizer.
A general guideline to use for mature Japanesemaple trees is 1/10 pound of nitrogen for every 1 inch of treetrunk diameter measured at 4 1/2 feet from the ground. If youfertilize other plants in the Japanese maple trees'area at the same time, use the guideline of 1/10 pound of nitrogenper 100 square feet.
Leaves. If the leaves on the Japanese maple treedry, curl or look scorched around the edges, it may not mean thetree is dying. It could indicate that the treeis not getting enough water. It could also indicate that the sun istoo hot for the tree in its current location.
Acidic Soils
According to Colorado State University, most garden andlandscape plants tolerate a pH up to 7.5 to 7.8, butacid-loving plants such as Japanese maples,blueberries, azaleas and rhododendrons need a more acidicsoil.Leaf curl is identifiable on newly sproutingJapanese maple leaves and twigs in the spring. Smallred areas appear on the emerging leaves, which thenbecome thick and turn yellow and whitish-gray. Fungal spores appearon the leaves and they pucker in odd shapes that causethe leaf deformity making them curl.
Lynn prefers to prune Japanese maples in latesummer, but beginners will find it easier to prune whentrees are leafless and dormant in late fall to midwinter.Light pruning can be done any season except spring, when sapis rising. The goal of pruning is to encourage thetree's natural and healthy growth habit.
Best Japanese Maples for Sun. AllJapanese maples are tolerant of part shade conditions. LikeDogwoods and Redbuds, they evolved to grow happily at theedge of the forest as small trees. Their undeniable beautyleads many people to want to plant them as a focal point orspecimen tree, often in full sun.
Morning sun and afternoon shade are ideal forJapanese Maple trees. Filtered sunlight is best. Ifyou are in the Upper or Middle South, full sun.
Dig in the Fall
Japanese Maples are best transplanted whenthey're dormant, which means fall. When digging up thetree, be careful of the roots. A rule of thumb is if thetrunk is 2" in diameter, dig at least 9" from the truck allaround.Most hydrangeas thrive in rich, porous, somewhatmoist soils. Add compost to enrich poor soil. Theyprefer full sun in the morning, with some afternoon shade;however, many will grow and bloom in partial shade. After water isdrained, fill the rest of the hole with soil.
Japanese maples (Acer palmatum) aredrought tolerant only when they're well cared for and wellestablished in their location. Best grown in U.S. Department ofAgriculture plant hardiness zones 5b through 8b, specimens must behealthy to survive a lack of water.
To make a simple potting mix forericaceous plants, begin with a base of half peat moss. Mixin 20 percent perlite, 10 percent compost, 10 percent gardensoil and 10 percent sand. If you are concerned about theenvironmental impacts of using peat moss in your garden, you canuse a peat substitute such as coir.
The best time to repot established containerplants is at the start of the growing season, in mid spring, thoughit can also be done at other times if necessary. Choose a containerthat is slightly bigger than the previous one; it's a mistake tomove a small plant straight into a large pot or tub.
Acers like moist soil in semi-shade, andneed to be protected from winds and late-spring frosts,which can damage their leaves.
The process of rooting a cutting from a Japanese maple isvery simple.
- Prepare a pot or flat by filling it with moist pottingsoil.
- Find new growth on the tree and cut that small branch.
- Remove the lower leaves from the branch and leave two or threeleaves toward the top of the cutting.
To acidify soil, start by scooping up some of thesoil in your hands to see if it's loose or compacted. Ifit's loose, mix some organic material into the soil toacidify it, like compost, manure, or sphagnum peat moss. If thesoil is compacted, mix elemental sulfur or iron sulfate intoit to make it more acidic.
How to plant acers. Plant your acerin clement conditions, either in spring or autumn. Dig a hole atleast twice as wide and a little deeper than the root ball. If youare on heavy soil break up the bottom of the hole and add atwo-inch layer (5cm) of planting compost mixed withgrit.
AAcers will respond very well to pruning.It is best to prune whilst the tree is dormant, so Decemberto February would be an ideal time of year. Make sure toprune back to a bud – this means cutting just abovethe bud. Simply prune the acer tree to the shape thatyou want it to be.
Acers are usually slow-growing trees, with somevery slow varieties available. This makes them perfect for smallgardens as they remain a manageable size. They seldom need pruningand don't cast too much shade. Some varieties of Japanesemaple can cope with full sun, especially those withgreen and purple leaves.
Pruning the upright Japanese mapleinvolves four main steps. The first is to prune off lower limbsthat crowd other low-growing shrubs or possibly impede a walkway.Next, prune off dead wood — that is, any dead twigs orbrittle branches that no longer grow foliage. The third step is toseparate the tree into layers.
These types of potting soils are perfect for mostannuals but terrible for Japanese Maples. You can useregular potting soil if it is only around 30% of yourmix. A mix with 30% potting soil, 50% pinebark, and 20% perlite will give you a mix that drains welland allows air exchange on the roots.
Loam based compost such as John Innes No 2 is besttogether with a bark mulch to help avoid water loss. Watering twicea day in hot periods is essential. Feed with a balancedproprietary fertilizer in spring just as the leavesemerge.
