Question
1)We have over 10 yr mulberry, blooms wonderfully, gets lots of berries, but they never ripen. What can we do?
2)Japanese maple in planter since last year was blooming wonderfully but we have hard very hard frost this past week.  We had tree covered but still looking very bad. Will it recover? Thank you

Answer
As far as the mulberry I would recommend fertilizing it.
I recommend a slow release, balanced fertilizer with micronutrients (a high quality 10-10-10). Check for a mix that contains iron, zinc, manganese, molybdenum, copper and boron. Read and follow directions. Use approximately 1 cup of fertilizer per application for each year of a mulberry抯 age (i.e. 1 cup per application for a one year-old plant). Be careful to spread the fertilizer evenly over the trees root zone and water it in well. Fertilize 3 times each year in February, May and July, avoiding a 2 inch area around the trunk.
I would just wait and see what the Maple does this spring. It should re-leaf. There may be some die back of a few branches--these can be pruned off after you are sure they are dead.
Symptoms of freeze damage include shriveling and browning or blackening of damaged tissue.  Damaged growth often becomes limp.  Eventually, damaged or destroyed leaves may drop from the tree or shrub.  
Fortunately, trees and shrubs have the ability to leaf out again if the initial growth is damaged or destroyed. Healthy, well established trees and shrubs should not be greatly impacted and will produce additional growth within a few weeks.  Trees and shrubs planted within the past 5 years may benefit from an application of fertilizer.  Give them some nitrogen when it warms up.  I like to apply urea (46-0-0) on trees and shrubs.  If you can抰 find urea, any other high nitrogen fertilizer is just as good.  A typical lawn fertilizer, something like 23-4-8, is good.